uMurmur is a minimalistic Mumble server primarily targeted to run on embedded
computers, like routers, with an open OS like e.g. OpenWRT. The server part of
Mumble is called Murmur, hence the name uMurmur. It is available as a
precompiled package for quite a lot distributions. Check your distribution's
package repository.

WWW: http://umurmur.net/