Twitturly – Real-time notification and Analytics service. Tracks and ranks the URLs being talked about on Twitter.

appTracks: Web
appTags: analytics, notification, ranking, real-time, tracking, URLs

twitterank – sort of like Page Rank for twitter users.

appTracks: Web
appTags: ranking

Twitterholic – Top Twitter user rankings and stats.

appTracks: Web
appTags: ranking, stats