XMMS is an open source media player similar to WinAMP. It supports most common audio formats, and also plays some videos.
XMMS has good audio compatibility, and can play a range of video formats. XMMS does have some problems when receiving streamed content.
vlc --sout http/ogg:127.0.0.1:8080/my_audio.ogg
As a temporary hack you could append "?.ogg" to the url you give xmms.
XMMS supports es, ps and mpeg1 muxers with mpga audio out of the box. The ts muxer gives strange audio in xmms.