Feel free to add to the list as you find sites you like.

Blogging & Microblogging

• Twitter
  • http://www.nytimes.com/2009/05/07/technology/personaltech/07basics.html?_r=1&scp=4&sq=twitter&st=cse

    Nice article on how to use Twitter

• Blogger
• WordPress

   

Randomness

• 43 Places
• Bloglines
• Community Walk
• Flickr
• Gigadial
• Glogster
• Odeo
• Podomatic
• Scrapblog
• Second Life
• Slideshare
• Suprglu
• Survey Monkey
• Voicethread
• YouTube
• Etherpad

Free Software

• Audacity (Easy audio editing and creation)
• Picasa
• Google Earth
• Other Google Products
• Hot Potatoes (Activity, quiz, etc. maker)
• Moodle  (course management software)

Creation Fun

• Google Sites
• Spell with Flickr
• Wordle

Wikis

• PBWiki
• Wetpaint (website/wiki creation)
• Wikidot
• Wikispaces