Pages 13 and 14 list all the Web 2.0 applications used. The book is a compilation of various classroom/school projects revolving around Web 2.0 applications or evolving because of them. Each lesson includes multiple links: the actual project, how to, the application.
While it uses Delicious as its model, it is a great explanation of Social Bookmarking.
Free Whiteboard Collaboration Tool
Annotated list of Web2.0 tools with links to direcitons and sample lessons.
Annotated list of Web2.0 tools with links to examples and directions.
A place to share pathfinders for a variety of collaborative library units.
This is a site created by a local teacher: Brian Dvorak. He shares and reviews a lot of neat Web 2.0 applications.
A free search engine that only returns pre-evaluated websites.
A search engine for younger, emerging learners. Try it out and let me know if you find it to be age appropriate.
This page describes their different products and selection criteria for inclusion of websites in search results.