Greasy Fork is available in English.
Last.fm scrobbler for Bandcamp, based on GM Scrobbler for Pakartot.lt script
< Feedback on GM Last.fm Scrobbler for Bandcamp
Sorry, I'm utterly unfamiliar with Libre.fm, so I'm afraid I'm not going to do anything for it anytime soon.
Libre.fm support
Can you support libre.fm service? It's almost the same API, just login-password based.