JRoar — Pure Java Streaming Server for Ogg
From the site:
JRoar is a streaming server for Ogg in pure Java
JRoar casts live Ogg streams to Ogg Vorbis players as IceCast2 does and shouts live Ogg streams to IceCast2 and JRoar(, but JRoar does not support encoding/re-encoding). JRoar also accepts live Ogg streams from IceS. The uniqueness of JRoar is that JRoar works as a proxy for live Ogg streams and enables you to share single stream with others. Of course, its characteristic property is that it is in pure Java. JRoar can be easily deployed and in fact, it can run on the built-in JVM of IE