mIRC - mIRC: Internet Relay Chat client
Nexmo - Nexmo is a simple two way SMS API with global reach and wholesale rates
Kiwi IRC - A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely.
MessageBird - Reach 7 billion phones in seconds via SMS, Chat & Voice. Try it for free and improve your communication.
HexChat - HexChat is a fork of XChat with bug fixes and new features.
Plivo - Plivo simplifies your customer engagement.