Twillow — A twitter directory, automation tool, auto follower, follower manager, tweet filter, keyword tracker, tweet scheduler, direct message auto-deleter…plus reporting and more.

appTracks: Web
appTags: auto delete, auto following, automation, direct messages, directory, follower, keyword, reports, schedule tweets, tracking, tweet filtering

Tweetlater – Schedule tweets, bulk upload tweets, track keywords, send welcome DMs, URL shortening, auto following, more.

appTracks: Web
appTags: auto following, direct messages, keywords, schedule tweets, tracking, url shortening

twitterhawk – A real time targeted marketing engine that will find people talking on twitter now by your chosen topic and location.

appTracks: Web
appTags: auto following, marketing, targeted following

tweet spinner – An advanced Twitter-based app to help small businesses, power Twitterers, and others increase their productivity.

appTracks: Web
appTags: auto following, productivity, rotate profiles, schedule tweets