Inbox Creature - A super cute virtual pet, delivered right to your inbox.
Twilio - Brings voice and messaging to your web and mobile applications.
HippityPip - Teach phone numbers to kids
Plivo - Plivo simplifies your customer engagement.
Splitwise - Splitwise is a free tool for friends and roommates to track bills and other shared expenses, so that everyone gets paid back. On the web, iPhone, and Android!
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.