Here is a list of Web 2.0 Tools

Blogging

• Blogger
• Class Blogmeister
• Edublogs

Microblogging

• Twitter

Wikis

• pbWiki
• Wikispaces

Podcasting

• Gcast
• Evoca
• PodcastPeople
• Podomatic

Social Bookmarking

• del.icio.us
• Furl

Photography

• Flickr

PowerPoint:

• Slideshare

Video:

• YouTube
• Google Video

Presentations:

• Slideshare

Aggregators:

• Bloglines
• Google Reader
• Pageflakes

Social Networking:

• Ning

Voice Tools

• Skype