Like the ones you tried, the java client, the flash client, or you can simply use winamp:
http://forums.fireflymediaserver.org/viewtopic.php?t=7076
A bad part is that it creates a playlist from your whole library. However, Winamp has some nice library browsing methods. i.e. queuelist
Another bad part is that every time you add new music, you have to generate the playlist again.
If you don’t mind having your whole library in winamp, and never add any music, maybe this suits your needs.