butt - butt (broadcast using this tool) is a streaming tool for live audio data from your computers Mic or...
Rocket Broadcaster - Broadcast live to your internet radio station (Icecast, SHOUTcast, and more).
Stream What You Hear - Stream What You Hear.
SHOUTcast Radio - SHOUTcast Radio is the home of free Internet Radio.
Icecast - icecast is free server software for streaming multimedia.
pulseaudio-dlna - A lightweight streaming server which brings DLNA / UPNP and Chromecast support to PulseAudio and Linux - masmu/pulseaudio-dlna