Huckle - Send group messages to people at places
Chalk - Chalk is a calculator that tries to do right what others do wrong.
CAKE - CAKE provides a SaaS-based solution for advertisers, publishers and networks to track, attribute and optimize their spend in real-time.
chitchat - Chat Room with Selfies and Pagers (yes, pagers!)
Twist - Check fewer notifications, do more meaningful work. Twist is the team communication app for calmer, more organized, and more productive teamwork.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.