Web 2.0: Cool Tools for Schools is a great site with a listing of hundreds of educational technology and web 2.0 tools that teachers and students can use in their classroom.

The resources are sorted by categories such as "presentation", "music", "collaborative", and "research". There are 18 categories, plus a "Teacher's Resources" page with lesson plans, books, games, and more.

I spent about an hour going through the site and found it to be a great place to go for resources. Definitely a site to bookmark and share with other educators.