Stubs
libspotify
LUA Websockets (old version)

The newer version is pure LUA and way to hard to satisfy the dependencies for considering you have to pick LUA 5.1 or LUA 5.2 and the reps either support one or the other or neither.
libwesockets-1.0

Version 1.1 & 1.2 are too new for the LUA websocket wrapper I found.