Released for the Satellaview, the Chrono Trigger Music Library allows players to play any song from the game. This includes Singing Mountain, but unfortunately not the full version of Frog's Theme. Along with the Chrono Trigger - Jet Bike Special and Chrono Trigger - Character Library, it forms the three Satellaview CT specials.
It has been translated by Terminus Traduction (who also translated Chrono Cross and Radical Dreamers into French). The patch is here.