It turns your phone into a remote for audio players. I tried it with foobar and it worked! It also says it supports winamp and itunes but I haven't tried those.
https://play.google.com/store/apps/details?id=info.kfsoft.android.MyRemote&feature=search_result#?t=W251bGwsMSwxLDEsImluZm8ua 2Zzb2Z0LmFuZHJvaWQuTXlSZW1vdGUiXQ..