Software for Social Media
RSS News readers
NetNewsWire - Mac
FeedReader - Windows
Twitter clients
Twitter main site
Tweetdeck
Tweetie - Mac
twhirl - multi platform
Textwit - Windows
Pwytter - Windows, Mac & Linux
Socialite - Mac: Twitter, RSS, Facebook. Flickr
Twitter Wiki page - http://twitter.pbworks.com
Wikis and Blogs
PBWorks (pbwiki)
Wikispaces
Wikidot
Blogger
Wordpress
Blog.com
MyBlogsite.com
40+ Free blog hosts (mashable.com)
Social Networks
List of major social networking sites
Facebook
Linkedin
MySpace
Podcasting and Audio Sharing
CounselorAudioSource.Net
Podcasting Tools
Podcast.com
K-12 Podcasting Ideas
rDio
Pandora
SoundCloud
Last.fm
Photosharing
Flickr
Photobucket
Picasa
Video sharing
Vimeo
YouTube
Viddler
Justin.tv
Ustream
Virtual World
SecondLife
ActiveWorlds
Open Life