Messengers

Discord is an instant messaging and VoIP social platform which allows communication through voice calls, video calls, text messaging, and media. Communication can be private or take place in virtual communities called "servers". A server is a collection of persistent chat rooms and voice channels which can be accessed via invite links.

TeamSpeak (TS) is a proprietary voice-over-Internet Protocol (VoIP) application service for audio communication between users on a chat channel, much like a telephone conference call. The client software connects to a TeamSpeak server of the user's choice, from which the user may join chat channels.

Mumble is a free, open source, low latency, high quality voice chat application.

Revolt is the chat app that's truly built with you in mind.

Guilded upgrades your group chat and equips your server with integrated event calendars, forums, and more – 100% free.