mendez
+1 For Kaidan, I just tried it, it's still primarily stuff, but it can at least chat.
Still lack important feature like http transfers and server side chat history but i guess they would follow quickly.
Can't comment about music players, there is too much, all dying after short period of time: amarok, juk, clementine, all of those i already forgot. Amarok was just fine, don't know how far dead is it or not but i would go / stay with it.