Nakama - Nakama is an open-source distributed social and realtime server for games and apps.

Mumble - Mumble is an open source, low-latency, high quality voice chat software primarily intended for use...

Apple Game Center - Game Center brings social gaming to OS X and iOS apps.

Vivox - Vivox is called to be one of the leading chatting platforms for online gamers.

MEGPlay - Where gamers gather. MEGPlay is the hub for esports and gaming communities across SouthEast Asia. Meet Gamers, Join Esports Communities, Get Sponsorships, Win Cash Competitions

Discord - Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.