So You're Twittering...Now What? CSLA Nov 21, 2009
Lists (on Twitter.com)
Replicates some of the list functionality in Tweetdeck, but others can subscribe to your list and you can subscribe to others. It is not currently collaborative.
Real Time Twitter Results on Google
Get realtime Twitter results on your Google searches:
If you don't already have it, install the Greasemonkey add-on for Firefox.
Click the "Install" button on the "Twitter Search Results on Google" page on userscripts.org.
Tweetie 2 for iPhone
Who Should I Follow http://whoshouldifollow.com/
Looks at your network and provides recommendations for new people you should follow. Includes user statistics to assist in decision-making.
A simple survey/poll application that collects responses quickly and easily.
Alternate app: Twtpoll http://twtpoll.com/
Ask a question of your Twitter followers and easily gather all their answers in one spot.
Share pictures on Twitter
Send private messages to groups on Twitter
Send messages to Twitter using voice.
Firefox browser extension. Post to Twitter from your URL address bar.
**iTweet.net** Combines much of the above into one application!
Twitter Sheep http://twittersheep.com/
See what your followers have in common
Find a Twitter group and join it