OSS Design Tools

Since this topic comes up every once in a while, here are two browser-based
applications I recently found. Both are free and open (as in beer and in
speech).

Rapid Rabbit
http://rapidrabb.it/en/wiki
Rapid prototyping tool which allows you to create links between pages. Good
for high level planning and screenflows.

Pencil
http://www.evolus.vn/Pencil/Home.html
UI mockup tool with stencils for Windows XP, Vista, and GNOME/gtk
applications.

--
Celeste 'seele' Paul
www.obso1337.org