ChipIn
If you're raising funds on Twitter,make use of Chipin to set a goal and let your supporters track the progress of the campaign.
TweetScope
This applications allows you to add very targeted followers to you account. This is a perfect tool for social media marketing. It automatically add users based on keywords and unsubscribe those who don\'t follow back.
TwitterTise
Schedule your tweets and track their clickthroughs with this app designed for Twitter advertising.
