Nabuur.github.com is a project mainly written in JavaScript, it's free.
Designs, wireframes and documentation for the NABUUR website
NABUUR documentation, designs, and wireframes
WIREFRAMES
Using Wireframesketcher http://wireframesketcher.com/
Directory layout
/assets Our own widgets, appearing in the Assets palette
/annotations Assets in the group Annotations, to be presented next
to Wireframesketcher's own widgets in that group
/... etc.
/screens Holds screen wireframes (to be reorganised in sub
folders when getting out of hand)
/stories Holds stories of screens (to be reorganised in sub
folders when getting out of hand)
/sketches Holds wireframe exports of stories to HTML, to be
linked from index.html to be easily accessible