1. conversation manager
1.1. TweetGrid
1.2. TweetConvo
1.3. Bettween
1.4. Tweeterclubs
2. trends on twitter
2.1. Tweetmeme
2.2. AppstoreHQ
2.3. Trendistic
2.4. Topsy
2.5. Twitturly
2.6. retweetist
2.7. TweetCloud
2.8. Topicfire
2.9. hashtags
2.10. Oneriot
2.11. twitterfall
2.12. collecta
2.13. Tweetfeel
2.14. Twittervision
2.15. Tweetvolume
2.16. geobased
2.16.1. trendsmap
2.16.2. NearbyTweets
2.16.3. Twitterlocal
3. following/followers
3.1. following recommandation
3.1.1. Klout
3.1.2. MrTweet
3.1.3. boarding.fr
3.1.4. Twollo
3.1.5. twiangulate
3.1.6. Whoshouldifollow
3.2. directories
3.2.1. french
3.2.1.1. PeopleTwit
3.2.2. Wefollow
3.2.3. Justtweetit
3.2.4. Twellow
3.2.5. Twittermass
3.2.6. twitterholic
3.2.7. twibs
3.2.8. twinfluence
3.3. followers/ing manager
3.3.1. Friendorfollow
3.3.2. untweeps
3.3.3. Tweepler
3.3.4. twerpscan
3.3.5. tweepsearch
3.3.6. chirpstats
3.3.7. twitterkarma
3.3.8. mytweeple
3.3.9. Qwitter
3.3.10. nest.uncluttered
3.3.11. mycleenr
3.3.12. twitoria
3.3.13. Tweeteffects
3.3.14. Twitter100
4. tweet analytics
4.1. Tweetstats
4.2. Twitalyzer
4.3. Twittercounter
4.4. Twitter grader
4.5. TwitGraph
5. client
5.1. mobile client
5.1.1. Tweetie
5.1.2. twitterrific
5.1.3. orangatame
5.2. desktop client
5.2.1. Tweetdeck
5.2.2. Seesmic
5.2.3. Twirl
6. media sharing
6.1. image
6.1.1. Twitpic
6.1.2. yfrog
6.1.3. Tweetphoto
6.1.4. Twitrpix
6.1.5. twidl.it
6.1.6. Twitxr
6.1.7. screentweet
6.1.8. twitngo
6.2. video
6.2.1. Qik
6.2.2. ustream
6.2.3. vidly
6.3. screen share
6.3.1. screenr
6.4. files
6.4.1. filesocial
6.4.2. filetwt
6.4.3. Twitdoc