Visual Understanding Envrionment
Writing about web page http://vue.tufts.edu/index.cfm
The Visual Understanding Environment (VUE) is an Open Source project based at Tufts University. The VUE project is focused on creating flexible tools for managing and integrating digital resources in support of teaching, learning and research. VUE provides a flexible visual environment for structuring, presenting, and sharing digital information.
Wow. A really amazing and interesting open source tool. You have to check it!