Like most SNS, there are many sites that offer extra features designed to enhance the user’s experience.  Below are some sites that help make the Twitter experience more enjoyable.

http://www.stumbleupon.com/tag/twitter/ - a variety of applications related to the Twitter SNS.

http://www.twittertroll.com/ - a search engine for Twitter.

http://politweets.com/ - keep track of your favorite political candidates.

http://twitterpacks.pbwiki.com/ - Twitter Packs is a place to get a starting idea of who on Twitter posts about what.

http://www.twi8r.com – converts English to text message lingo and vice-versa.

http://www.twitterlocal.net/ – see tweets near you, search tweets by area.

http://tweetburner.com/ – Follow how many people click links you post to Twitter.

http://quotably.com/ – Follow conversations more easily, as a thread, and see who is answering and commenting.

http://twittes.com/ – Links about Twitter: great place to do research about Twitter, find out whats new, and what people are doing with it.

And the list goes on and on and on and….

For more useful resources for Twitter or your favorite SNS, just google!