Rarog - Rarog provides a solution for hypertargeted Twitter campaigns.
Tweet Activity Dashboard - Real-time impressions & engagements of your Tweets
TweetDeck - TweetDeck is your personal browser for staying in touch with what’s happening now.
Owlead - Grow your Twitter with valuable followers, effortless
Hackisitor - Hackisitor offers solutions to boost twitter audience engagement.
TweetFull - Twitter Growth Service