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

Overwolf - Overwolf adds epic overlay apps to your favorite games.

GSC - With GSC, you can pick from any of 14 worldwide datacenters to host your own free voice server.

RaidCall - Free & Light. Setting up is fast and easy; with no need to rent or set up servers. Low CPU usage and minimum memory footprint allows for smooth, uninterrupted communication. im. Group Communication.

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

TeamTalk - TeamTalk 4 is a conferencing system which enables a group of people to collaborate and share...