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.
Burner - Disposable phone numbers -- now with MMS photo support
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Phoner Second Phone Number - Phoner provides business owner, sales people, lawyers, doctors, police officers and others with a...
Zulip - Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.
Numero eSIM - Numero eSIM is a phone-number app that makes voice and data possible anywhere in the world, for free.