Design for Action was a course I attended in my third semester. It was all about the process of designing interfaces, testing and improving them
Along with a lot of theoretical readings and practical exercises, we had to form groups and come up with own ideas. We built paper prototypes and tested our designs on various people while exerting the techniques we learned before.
My group developed a desktop-like system for placing bookmarks, a bookmark wall (Firefox later used a similar system for the tab-groups-feature).
The whole project can be found well documented on the Wiki page of our faculty.
Here are some sketches:
Adding a new bookmark.
Create folders & put bookmarks in them.