BlackMagic.so - Magic Sidebar is the best browser extension for Twitter. Use it today and unlock insights you never knew about, communicate better with your audience, and build strong 1:1 relationships. Mobile apps for iOS and Android are also available!
Snaptivity - Real-time photo sharing with the world nearby
Hypefury - No idea what to share on Twitter?
Flashgap - Time-delayed photo-sharing app of last night's embarrassment
Tribe - Create highly targeted Twitter ad campaigns in 5 mins
Poparazzi - Take photos of your friends