Pingendo : The simplest app for Bootstrap prototyping. Create quality HTML prototypes quickly, using popular open source tools like Bootstrap, LESS, Fontawesome ...
QtWeb Internet Browser : QtWeb is a fast, lightweight and portable browser with some unique UI and privacy features. QtWeb is an open source project based on Nokia's Qt framew...
Pattern Tap : Organized Web Design Collection of User Interfaces for Inspiration and Ideas. The CSS Gallery Alternative
Inkscape : Inkscape is a professional vector graphics editor for Windows, Mac OS X and Linux. It's free and open source.
Wireframing, mockups and prototyping for websites and applications
