It would be nice if, similar to the FFI article, there was one collecting all the languages implemented on top of the BEAM. @marianoguerra promised a tweet in https://invidio.us/watch?v=0MTiqI9v-ck (Implementing languages on the BEAM by Robert Virding & Mariano Guerra | #OpenErlang webinar), but it doesn't seem to have materialized - or at least, I can't find it ;P