Mumble is a free, open-source, cross-platform voice over IP application. Its primary users are gamers, and it is similar to programs such as TeamSpeak and Ventrilo. It uses a client–server architecture where users who want to talk connect to the same server.
Mumble's stated design goal is not to create the most elite gaming utility but to create the most social one. The goal is to recreate the feel and social interaction of a LAN party. As such, Mumble has a very simple administrative interface and most of the engineering effort is put into sound quality and low latency.