prototyping tool open-source
An open-source GUI prototyping tool
http://pencil.evolus.vn/
Pencil is built for the purpose of providing a free and open-source GUI prototyping tool
that people can easily install and use to create mockups in popular desktop platforms.
http://uxdesign.cc/ux-tools/
you use to materialize and communicate your design ideas? What are the
best tools for wireframing, prototyping, user testing, or simply just
managing your design activities?
We usually prefer tools that are unexpensive (ok, everyone does), that
do not require software installation (browser-based tools) and that
provide us with a good user experience when we're projecting experiences
for other people. After all, that's how we spend a big part of the day.