Hypegrowth - Hypegrowth is a personal Twitter assistant that allows to grow Twitter audience.
YoruFukurou - YoruFukurou (NightOwl) is a Twitter client for Mac OS X, designed for Twitter addicts.
Jooicer - Superpowers to boost your Twitter Growth
Echofon for Twitter - Download Echofon apk 3.1.3.3 for Android. Echofon for Android - A super clean Twitter app
HootSuite - Enhance your social media management with Hootsuite, the leading social media dashboard. Manage multiple networks and profiles and measure your campaign results.
Talon for Twitter - Elegantly designed, ad-free Twitter experience for Android