Scrum Master Certified SMC de ScrumStudy en medellin el 25 y 26 de noviembre

Scrum ya cambio la forma en que se gestionan los proyectos y startups en el mundo, ahora en medellin .

Socio ScrumStudy

Certificacion Internacional Scrum Master SMC de Scrumstudy, Medellin hotel Alamada de la 10, 25y 26 de noviembre

Scrum el marco de gestion agil de proyectos que esta revolucionando el mundo.

Organizado por :  www.opensourcepyme.com

Beneficios

informes
ventas@opensourcepyme.com

GIMP el mejor editor grafico GPL :-) ahora en español, Linux y windows Free

Todo lo que necesitas saber de GIMP en español
https://docs.gimp.org/2.4/es/index.html

Para grabar en formatos de imagen jpeg o bmp, photoshop, corel , etc :-)
En el menude Archivo, Exportar y aparcen todos los formatos , 

Como ajustar el tamano de una imagen
https://docs.gimp.org/2.4/es/gimp-tutorial-quickie-scale.html

Odoo un open ERP :-) con todos los juguetes :-)

Se puede descargar la version Open , desde la pagina para linux (ubuntu / redhat fedora) o windows
yo lo voy a instalar en windows 7 pro :-)
Como hacerlo esta en :
https://doc.odoo.com/es/book/

Ubuntu 16, con teamviewer 11

Descargar el paquete del la pagina de teamviewer, sino instala al descargarlos seguir las intrucciones recomendadas

https://www.teamviewer.com/es/help/363-How-do-I-install-TeamViewer-on-my-Linux-distribution.aspx#other

Ami me funciono asi :-)
1. entrar en un terminal .
2. cambiarse a administrador o root (SU)
3. ir a la carpeta de las descargas y ejecutar las instruccion

For the 32-bit/64-bit Multiarch package:

• dpkg -i teamviewer_11.0.xxxxx_i386.deb

For the 64-bit without Multiarch package:

• dpkg -i teamviewer_11.0.xxxxx_amd64.deb

Como aparece el mensaje
 “dpkg” indicates missing dependencies, complete the installation by executing the following command:

• apt-get install -f
   A rezar un rato , pues esta analizando las dependiencias :-)
  
  Y sorpresa funciona,

Cliente de correo ThunderBird, una alternativa para outlook :-) Es eapañol :-)

Consejos y trucos

Aprende consejos y atajos que te ayuden a trabajar más rápido

https://support.mozilla.org/es/products/thunderbird/tips-and-tricks

Q facil fuc configurar la cuenta de hotmail.com
y ya se como guardar una copia de los datos de correo :-)

Ubuntu 16.04 configurar Wifi

Ubuntu 16.04 lo mejor :-) con soporte a pantallas tactiles :-)


mirar si esta al Wifi detectada y facil
https://help.ubuntu.com/stable/ubuntu-help/net-wireless-connect.html
en un terminal como user root :-)
ifconfig

si no aparece, a buen reto , pa delante

https://help.ubuntu.com/stable/ubuntu-help/net-wireless-troubleshooting-hardware-check.html

Verificar si el adaptador fue reconocido

Check that the wireless adapter was recognized

http://askubuntu.com/questions/55868/installing-broadcom-wireless-drivers


lspci -vnn | grep Network showed:

Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller [14e4:432b] 

iwconfig showed:

lo        no wireless extensions.
eth0      no wireless extensions. 

if you have previously installed the bcmwl-kernel-source package, you will need to remove it by using the purge method:

sudo apt-get purge bcmwl-kernel-source 

2. Preparing the System

 :-)

Los mejores 10 aplicaciones para desarrollo movil para andriod

10 Best Free Mobile Application Development Frameworks That Support Android

Top 10 Open Source Frameworks

Our top 10 open source mobile app frameworks are listed below in alphabetical order, with links to product pages. Unless otherwise noted, the software is available only in a free, open source version.
Framework 7 -- iDangero.us -- Since version 1.0 was released a year ago, Framework has been one of the best choices for developing iOS apps. Now that it offers Android support, it’s also a good option if you want to start with iOS, then build an Android version with an iOS like look and feel. Features include Material Design UI, native scrolling, 1:1 page animation, a custom DOM library, and XHR caching and preloading.
Ionic – Ionic – Based on the Sass CSS extension language, this popular cross-platform framework is fairly easy to use, yet it can also integrate AngularJS for building more advanced apps. Ionic offers a library of mobile-optimized HTML, CSS, and JS CSS components, gestures, and tools, and works with predefined components. A command-line interface provides features like emulators, live reload, and logging, There’s also a Cordova-based app packager.
jQuery Mobile – jQuery Foundation – Based on jQuery, this mature, lightweight framework lacks many of the advanced features of most packages here, but it still has a large, committed user base. While it offers features like semantic markup, progressive enhancement, themable design, PhoneGap/Cordova support, there’s not much here for native-like functionality and performance or advanced UI. On the other hand, its simplicity means that “write once, run anywhere” is often an achievable goal, and it’s a good choice for simple apps that also need to run on Windows Phone and BlackBerry.






Kendo UI – Telerik – This jQuery based HTML5/JavaScript framework is available in open source and commercial versions. The enterprise-friendly Kendo UI offers a wide selection of UI widgets and plugins. It’s best known for its numerous prebuilt themes with Material Design styling, as well as a theme builder for custom themes. Other features include Angular and Bootstrap UI integration, as well as performance optimizations.
Mobile Angular UI – Maurizio Casimirri – This open source project combines AngularJS and a modified version of Twitter’s Bootstrap into a mobile UI framework. It is said to retain most of Bootstrap 3’s syntax for easier web-to-mobile portability while adding mobile components missing from Bootstrap, such as switches, overlays, sidebars, scrollable areas, and fixed-positioned navbars. Libraries include fastclick.js and overthrow.js.
NativeScript– Telerik – As the name suggests, NativeScript focuses on native UX development, but it offers cross-platform code-sharing support across Android and iOS. The software uses existing native UI libraries, with UI is described with JavaScript, XML, or optionally, Angular. It’s not as easy to use as Telerik’s more traditional cross-platform Kendo UI framework, however.



Onsen UI – Asial Corp. – Onsen is built on HTML and CSS, and is designed to work with PhoneGap and Cordova, which are not pre-integrated. It can also work with Angular and jQuery. As the name suggests, the program stresses UI development, and offers a wide range of web-based UI components and features, such as two-column views for tablets. (Material Design, however, is still missing.) The well-documented program is pitched at jQuery Mobile users who need ease of use but want more functionality, performance, and UI features. A drag and drop GUI tool is under development at Tokyo-based Asial, which also develops and maintains Monaca.
React Native – Facebook – React Native is an open source spin off of Facebook’s React JavaScript framework, which famously replaced the earlier HTML5 foundation. As the name suggests, this high-end, iOS-focused program is more of a native app package than a cross-platform framework, but with its new Android support, it loosely fits our requirements, as you can essentially write once in JavaScript and port to both platforms. Currently, only OS X desktops are fully supported, although there are experimental Linux and Windows versions for Android development.
Sencha Touch – Sencha – Sencha's mature, enterprise-focused HTML5/JavaScript framework is available in both open source and commercial versions. Sencha builds upon ExtJS to enable native-like performance. It provides a visual app builder for HTML5, as well as the ability to reuse custom components. A native packager streamlines distribution to stores like Google Play.
Titanium – Appcelerator – Unlike the more web-oriented frameworks, Titanium uses JavaScript to create native code, with claimed benefits in performance. This Node.js-based SDK offers over 5,000 APIs for iOS, Android, Windows, Blackberry, and HTML5. Titanium is known more for its performance and extensive feature set than for ease of use. The software is open source, but the full-featured free version is free only as long as you don’t publish your app, at which point you have to pay at least $39 per month.

 Fuente: https://www.linux.com/news/10-best-free-mobile-application-development-frameworks-support-android

Editor de texto de linux , VI y VIM comandos basicos

Comandos "vi" ("vim") de uso frecuente

ESC	Abandonar el modo de inclusión de texto para volver
	al modo de comandos; también se usa para cancelar
	comandos. (Usarlo en caso de duda)
Cntl-F	Avanzar una pagina hacia adelante
Cntl-B	Avanzar una pagina hacia atrás
Cntl-L	Refrescar la pantalla
G	Cursor al final del fichero
1G	Cursor al principio del fichero
$	Cursor al final de la linea
0 (cero)	Cursor al principio de la linea

.

a	Añadir texto a continuacion del cursor [TEXTO]
i	Insertar texto en la posicion del cursor [TEXTO]
A	Añadir texto al final de la linea [TEXTO]
I	Insertar texto al principio de la linea [TEXTO]
o	Añadir una linea debajo de la del cursor [TEXTO]
O	Añadir una linea encima de la del cursor [TEXTO]
u	Deshacer el último cambio realizado
:red	Rehace los cambios deshechos con ''u'' o '':u''
x	Borrar un caracter (y ponerlo automaticamente en el ALMACEN)
D	Borrar el resto de la linea (a la derecha del cursor)
dw	Borrar una palabra (hasta el primer blanco a la dcha. del cursor)
dd	Borrar la linea entera
8x	Borrar 8 caracteres
2dw	Borrar 2 palabras
7dd	Borrar 7 lineas
p	Poner el contenido del ALMACEN temporal a continuacion del cursor
P	Poner el contenido del ALMACEN temporal antes del cursor
s	Substituir un caracter por texto [TEXTO]
15s	Substituir 15 caracteres por texto [TEXTO]
r	Substituir un solo caracter por otro nuevo, sin entar
	en modo de TEXTO
R	Sobreescribir [TEXTO]
J	Unir la linea del cursor y la siguiente
i[ENTER]	Romper una linea en dos
.	Repetir el último cambio realizado
yy	Poner la linea presente en el almacen temporal
5yy	Poner cinco lineas en el almacen
:w	Guardar en el fichero que se esta editando los cambios realizados
	(Aconsejable ejecuarlo de vez en cuando)
:w!	Idem, forzandolo si fuese necesario.
:w Fichero	Guardar en el fichero "Fichero"
:wq	Guardar y salir de "vi".
:wq!	Idem, forzandolo si fuese necesario.

NOTA: Cada vez que se borra texto, el texto borrado pasa a un ALMACEN temporal, de donde elimina lo que estuviese almacenado previamente.

:q	Salir de "vi", si no se han realizado cambios desde
	la última vez que se han salvado.
:q!	Salir de "vi" en todo caso. No se guardan aquellos
	cambios que no se hayan salvado.
:set nu	Visualizar los numeros de las lineas
:set nonu	Ocultar los numeros de las lineas
+	Ir a la linea siguiente
-	Ir a la linea anterior
:+8	Ir a la linea que esta 8 puestos más abajo
:-9	Ir a la linea que esta 9 puestos más arriba
:6	Ir a la linea numero 6
ma	Marcar la linea del cursor con la etiqueta 'a'.
	(Sólo puede usarse una letra)
'a	Ir a la linea marcada con 'a".
:$	Ir a la última linea del fichero, "$".
:P,U d	Borrar las lineas entre P y U, ambas incluidas.
	P y U son identificadores de lineas, es decir,
	numeros de lineas o etiquetas. Ejemplos:
	:6,'a d borrar las lineas entre la "6" y la 'a'
	:'a,'b d borrar las lineas entre la 'a' y la "b"
	:'a,$ d borrar las lineas desde 'a' hasta el final
:P,U w Fichero	Escribir en el fichero "Fichero" las lineas
	comprendidas entre P y U, ambas incluidas
:r Fichero	Leer el contenido del fichero "Fichero" y ponerlo a
	continuacion de la linea del cursor.

Fuentes:
http://web.ua.es/cuantica/docencia/ccem/teoria/node127.html

Educacion Open Source - MOOC - en español y de clase mundial

Mooc es el acrónimo en inglés de Massive Online Open Courses ( ó Cursos online masivos y abiertos ). Los cursos masivos no han sido otra cosa que la evolución de la educación abierta en internet

http://mooc.es/

cientos de cursos en español, super buenos

Como evitar los virus informáticos v1

El computador es una herramienta que hace lo que le decimos, todavia no es autonomo :-) Siendo asi :-)

Soy responsable de usalo adecuadamente y debo tener CONCIENCIA de la informacion que recibo :-)

Consejos para evitar los virus informáticos

A pesar de la gran cantidad de noticias sobre los virus y sus efectos, son pocos los usuarios que realmente conocen su comportamiento. La educación e información constituyen los pilares básicos para mantener limpio tu PC.

Verifica, antes de abrir, cada nuevo mensaje de correo electrónico recibido

El correo electrónico es el medio de transmisión preferido por los virus, por lo que hay que tener especial cuidado en su utilización. Cualquier correo recibido puede contener virus aunque no le acompañe el símbolo de datos adjuntos (el habitual "clip"). Además, no es necesario ejecutar el archivo adjunto de un mensaje de correo para ser infectado; en algunos sistemas basta únicamente con abrir el mensaje, o visualizarlo mediante la 'vista previa'.
Para prevenir esto, lo mejor es verificar los mensajes inesperados o que provengan de una fuente poco habitual. Un indicativo de posible virus es la existencia en el asunto del mensaje de palabras en un idioma diferente al utilizado normalmente por el remitente.

Evita la descarga de programas de lugares no seguros en Internet

Muchas páginas de Internet permiten la descarga de programas y archivos a los ordenadores de los internautas. Cabe la posibilidad de que estos archivos estén infectados con virus. Como no existen indicadores claros que garanticen su fiabilidad, debemos evitar la descarga de programas desde sitios web que no nos ofrezcan garantías. Por lo general, son sitios seguros aquellos que muestran una información clara acerca de su actividad y los productos o servicios que ofrecen; también los avalados por organizaciones tales como editoriales, organismos oficiales, etc.

Rechaza archivos que no hayas solicitado cuando estés en chats o grupos de noticias (news)

Gracias a Internet es posible intercambiar información y conversar en tiempo real sobre temas muy diversos mediante los grupos de noticias y los chats, respectivamente. Los grupos de noticias o "news", como no son listas de correo y usan su propio sistema de transmisión por Internet (NNTP), también necesitan de una protección eficaz y constante.
Ambos sistemas, además de permitir la comunicación con otras personas, también facilitan la transferencia de archivos. Aquí es donde hay que tener especial cuidado y aceptar sólo lo que llegue de un remitente conocido y de confianza.

Retira los disquetes de las disqueteras, CD's o DVD's, incluso las memorias USB al apagar o reiniciar el ordenador

A pesar de que Internet es uno de los medios de propagación de virus más habituales, cabe resaltar que los disquetes siguen siendo una vía de infección de gran magnitud. Además de analizar con un antivirus todos los disquetes utilizados, una forma de evitar que se activen los ya clásicos virus de boot o de arranque consiste en retirar los disquetes de las disqueteras al apagar o reiniciar el ordenador.
Por si se nos olvida hacerlo, es conveniente contar con un antivirus capaz de comprobar en tales circunstancias la existencia de disquetes infectados.

Realiza periódicamente copias de seguridad

Una muy buena forma de minimizar el impacto de un virus, tanto a nivel corporativo como particular, es restaurar las copias de seguridad de nuestra información. Realizar copias periódicas y frecuentes de nuestra información más importante es una magnífica política de seguridad. De esta manera, una pérdida de datos, causada por ejemplo por un virus, puede ser superada mediante la restauración de la última copia.

Fuente: http://salva.sbsnet.es/wiki/index.php?title=Consejos_para_evitar_los_virus_inform%C3%A1ticos 

Diagramas avanzados Open Source alternativas a Microsoft Visio

Esta herramienta posee una interfaz ideal para la creación de diagramas avanzados y diseños, y lo bueno es que permite a los usuarios  conectar esos diagramas creados a motores de bases de datos para luego mostrar esa información de forma gráfica.


     Inkscape
https://inkscape.org/es/acerca-de/de-un-vistazo/ 
Inkscape es un editor de gráficos vectoriales de código abierto, similar a programas como Adobe Illustrator, Corel Draw, Freehand, Xara X... Lo que lo hace único es que usa como formato nativo el Scalable Vector Graphics (SVG), un  estándar abierto de W3C basado en XML.


Dia Diagram
https://sourceforge.net/projects/dia-installer/?source=directory#reviews
Dia Diagram Editor is free Open Source drawing software for Windows, Mac OS X and Linux. Dia supports more than 30 different diagram types like flowcharts, network diagrams, database models. More than a thousand readymade objects help to draw professional diagrams. Dia can read and write a number of different raster and vector image formats

Features

• Draw structured diagrams (flowcharts, network layouts, etc)
• Easy to use (Recommended in 89% of the user ratings)
• More than 1000 predefined objects and symbols
• Supports Windows, Mac OS X and Linux
• Many im- and export formats
• Scriptable via Python

Monitores de red Open Source

Hay dejo varias fuentes, abajo relacionadas :-)

http://www.cacti.net/ 
About Cacti
Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an intuitive, easy to use interface that makes sense for LAN-sized installations up to complex networks with hundreds of devices.
 

Icinga

Icinga is an offshoot of Nagios that is currently being rebuilt anew. It offers a thorough monitoring and alerting framework that’s designed to be as open and extensible as Nagios is, but with several different Web UI options. Icinga 1 is closely related to Nagios, while Icinga 2 is the rewrite. Both versions are currently supported, and Nagios users can migrate to Icinga 1 very easily.

NeDi

NeDi may not be as well known as some of the others, but it’s a great solution for tracking devices across a network. It continuously walks through a network infrastructure and catalogs devices, keeping track of everything it discovers. It can provide the current location of any device, as well as a history.
NeDi can be used to locate stolen or lost devices by alerting you if they reappear on the network. It can even display all known and discovered connections on a map, showing how every network interconnect is laid out, down to the physical port level. 

Observium

Observium combines system and network monitoring with performance trending. It uses both static and auto discovery to identify servers and network devices, leverages a variety of monitoring methods, and can be configured to track just about any available metric. The Web UI is very clean, well thought out, and easy to navigate.
As shown, Observium can also display the physical location of monitored devices on a geographical map. Note too the heads-up panels showing active alarms and device counts.

Zabbix

Zabbix monitors servers and networks with an extensive array of tools. There are Zabbix agents for most operating systems, or you can use passive or external checks, including SNMP to monitor hosts and network devices. You'll also find extensive alerting and notification facilities, and a highly customizable Web UI that can be adapted to a variety of heads-up displays. In addition, Zabbix has specific tools that monitor Web application stacks and virtualization hypervisors.
Zabbix can also produce logical interconnection diagrams detailing how certain monitored objects are interconnected. These maps are customizable, and maps can be created for groups of monitored devices and hosts. 

 

 

 

Fuentes:
1 http://www.networkworld.com/article/2880536/network-management/best-open-source-monitoring-tools.html

2 http://www.infoworld.com/article/2683857/network-monitoring/article.html#slide7

Eventos administracion - Open Source Event Manager

Administracion de eventos Open Source

http://osem.io/
OpenSourceEventManagement OSEM
OSEM le ayuda a pedir papeles en su comunidad. Recibir, clasificar, evaluar y presentaciones de programación para el evento.
OSEM le ayuda a comunicar el valor de su evento. Crear una página de bienvenida y el orden del día. Permite que los visitantes se registren y compre los boletos para su evento.
OSEM le apoya con mantenerse en la cima de su evento. Obtenga información sobre la evolución del programa y la audiencia de su evento.

OSEM helps you to call for papers in your community. Receive, classify, evaluate and schedule submissions for your event.
12 soluciones mas de administracion de eventos Open Source

fuente: http://blog.capterra.com/free-event-management-software/


Finding the latter for free, when it works well and meets your event planning needs, can save you precious dollars and also from using a few other four-letter words.
Here’s our list of the top open source and free event management software out there:

Free/Freemium Options

123ContactForm

In its free version, this platform creates event registration forms. For one user, it includes five forms, with up to 10 fields in each. You are also limited to collecting 100 submissions each month.
To get payment integration, you’ll have to upgrade to the Platinum or Diamond versions.
The good news is 123ContactForm integrates with WordPress and a number of other publishing platforms, as well as Facebook, Twitter and Hootsuite.

Anyvite

Anyvite lets you create event invitations, to be sent by email or posted publically on a webpage. They can be personalized with your own image, or you can choose from pre-made designs. Once they’re sent, you can message guests based on their RSVP and add an Anyvite widget to your site.
Ticketing and payment collection, however, incur a separate fee of $0.99 plus 2.5% of the ticket price, with card processing fees on top of that.

Event Track/Jolly Events

The free edition of Event Track is made to work with the free online event registration platform Jolly Events.
With Jolly Events, you can register attendees online on a customized registration form, send invitations, and send registration confirmation emails with barcodes. Then you can export your guest data for Event Track, which lets you register attendees on-site, register them for specific sessions of an event, print nametags, and scan barcodes to verify them.
Be wary, though: the free edition is “as is.” Jolly Events does not offer any warranty, or email or phone support for this product.

eventsbot

Event management on the EB Basic level is completely free. It’s robust for a free version, and includes a wide range of features, including event registration, an event page, and up to 500 email invitations.
Plus, you have options for collecting payments, which can go directly into your Paypal account. You’ll also be able to track progress and produce reports.
To get automated invoice and online payments, customize your event page’s look and remove ads, or offer an offline payment option, you’ll have to upgrade to the premium version, which has a 2% per ticket fee (which can be added to the ticket price).

Evite

If all you need is an invitation and RSVP system, the free version of Evite will fit the bill. The ad-supported option has a limit of 750 invitations, with a large selection of designs.
The premium version (price varies based on number of guests) allows you to customize invitations.

Seating Arrangement

Specifically geared to planning a wedding, Seating Arrangement does more than just manage table space. It will be useful to any planner working on a banquet or dinner event.
You can use it to manage the guest list and menu options, sort guests by preferences like age or social group, track RSVPs, and print place cards. Its web-based design lets you work on your event from multiple locations.

OpenConf

Sure, you could pay for more for extra bells and whistles, but when you are running small events, why pay at all? That is the theme of OpenConf Community Edition. What started as a peer review software solution in academia has been expanded over to cover several areas of event management, such as data export and email notifications to attendees.
If you are willing to host your own server, provide your own support for your maintenance issues, and abide by the license, OpenConf Community Edition is free for download and use.
Unfortunately the software does not cover the more advanced and new aspects of event management software, such as social media integration and mobile app use, as well as key features such as ticketing and vendor management. So, you take what you can get when it comes to OpenConf.

EventLeaf

Whether you want to host offline native software or run your event management system online, Jolly Tech has you covered with their free edition of EventLeaf. If you are running a PC with Windows Vista or higher and accept no warranty or tech support, you will be able to enjoy the benefits of EventLeaf.
Jolly Tech’s new free event management software is an updated version of their own “EventTrack” which was solely an online platform, but which can now be run offline on your system at your command. All of the old features, such as on-site event attendee registration and badge creation, have been retained with a newer, more polished look.

RSVPify

RSVPify may be geared towards weddings, as advertised on the main page, however it is easily adaptable to any type of event. This option offers a free plan which covers up to 100 RSVPs, a custom URL, customization options, data imports, and many other features.
To unlock unlimited RSVPs, unlimited guest tracking, and high-end features you have to upgrade to a paid plan starting at $8.99 a month.

Event Espresso Lite

Event Espresso Lite is a free WordPress plugin version of the paid full version. Despite being a free plugin, Event Espresso Lite is a solid option for event managers to integrate their registration and event management process with their WordPress website, making for a more seamless transition between event management functions and your main site.
This version is currently on its third generation but is soon to be replaced by Event Espresso 4.

Open Source Options

ConfTool

VSIS ConfTool, ConfTool’s open source system, is available through a free license for noncommercial events. It is intended for academic and nonprofessional event planners.
For up to 150 participants, it offers a customizable registration form, file uploading and online submissions, and online review forms. At a conference, you can use it to check in attendees.
For payment processing other than cash, check, or bank transfer, you’ll need the pro edition.

Fusion Ticket

This box office and ticketing software is aimed at small venues and charity organizations. It allows you to sell tickets online, including e-tickets with barcodes, as well as have POS capability at the box office.
The system is customizable with templates, allowing you to set seating charts and pricing categories. It has a ticket taker interface for entry, too.

Odoo

Odoo’s open source event app has a slew of features for every stage in the event planning process.
You can create event pages with a user-friendly editor, and make agendas for each event. Sell tickets online at multiple levels, promote using automated emailing and social media integration, and track site success with Google Analytics.
Odoo also offers SEO tools and landing pages, and integrates fully with the rest of the Odoo suite of apps.

Open Conference Systems

This tool was created for scholarly conferences. With OCS, you can create a conference website, call for paper submissions, post papers in a searchable format, and register participants.
After the conference has come and gone, it also has online discussion abilities to keep the conversation going.

OpenConferenceWare

For those who are particularly tech-savvy, OpenConferenceWare requires a Rails application.
It’s customizable, and is a platform where anyone can list sessions for an event, create and update proposals, subscribe to a feed, show rooms, and create a profile. Administrators can create and change events, set proposal deadlines, and manage rooms and sessions.

Open Source Event Manager

OSEM has a broad array of capabilities in an open source format.
With it, you can build a website for your event and a detailed schedule for attendees with session information pages as well. Attendees can use it to register and submit proposals, while planners can track everything from registrations to venues to sponsorship in the administrator dashboard.

Bonus List: Pass the Fees to Attendees

Beyond the purely free software out there, there is also software that forwards the cost to event guests, making the software itself free for you. Below is a comprehensive list of these systems. Most are totally free for events that don’t charge admission, but have fees for paid events that can be rolled into the ticket price.
Standard features include event websites, online registration, payment processing, email communication, social media integration, and analytics. They also tend to be easy-to-use, but not customizable.
Here are the 13 software options in this category (free for free events are marked with an *):

• Attendly*: set your own booking fee, plus 2.9% + $0.30 for payment processing
• Brown Paper Tickets: $0.99 + 3.5% of the ticket price, which includes Brown Paper Tickets’ credit card processing—event managers who use their own payment processing get 2.5% back
• Eventbee*: $1 to $2 per ticket, depending on features, plus payment processing fees
• Eventbrite*: 2.5% of the ticket price plus $0.99 per ticket, plus a 3% payment processing fee, but your attendees pay only the 3% processing fee (not those related to ticket price) if buying through one of Eventbrite’s mobile apps
• Eventgrid*: 2% online ticket fee, plus 2.9% + $.30 credit card processing fee
• Eventzilla*: $1 per attendee plus processing fees
• Picatic: choose your fee with their FairPay system, plus credit card fees
• PlanetReg*: $0.50 + 2% of the cost of each registration, capped at $9, plus processing fees
• rsvpBOOK: $2.95 to $3.95, or $1.99 for nonprofits, depending on look and feel, plus processing fees
• Ticketbud*: $0.99 + 2% per ticket, plus card processing (2.9% for the Ticketbud system)
• Ticketleap*: 2% + $1 for online sales plus 3% credit card processing fee if you use Ticketleap Payments (you pay your own processing fees separately if you use PayPal or Authorize.net), no fee for onsite sales
• UTicketIt*: 2% of ticket value + $.99 per ticket, plus 2.9% + $0.30 per transaction to process payments
• ZapEvent*: $1.30 per registration plus 4.9% of the order total
• Bizzabo: Pricing for Bizzabo ticketing is flexible and under the control of the event manager running the software.