YoruFukurou - YoruFukurou (NightOwl) is a Twitter client for Mac OS X, designed for Twitter addicts.
Evercontact - Your contacts always up to date and automatically with Evercontact.
Echofon for Twitter - Download Echofon apk 3.1.3.3 for Android. Echofon for Android - A super clean Twitter app
CONTACTBOX - CONTACTBOX combines the simplicity of an address book with effective functions of a CRM system.
Talon for Twitter - Elegantly designed, ad-free Twitter experience for Android
CRM-gx - Contact Management