BLOKK font : BLOKK font gives you a nice fill text for mock-ups and wireframing without the lorem ipsum. The new and better wireframing font.
Arora : Arora is a lightweight cross-platform web browser. It's free (as in free speech and free beer). Arora runs on Linux, embedded Linux, FreeBSD, Mac OS X...
YunoHost : YunoHost is a server operating system aiming to make self-hosting accessible to everyone.
Origami Studio : Origami is a free tool for designing modern user interfaces.
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
