Songs of the Pioneers http://www.freedrama.net/songs.htm
This play uses traditional songs from pioneer times and early American tunes.
The Hysterical History of the Trojan War http://freedrama.net/troy.html
This play has a lot of satirical songs which use modern tunes with new silly lyrics sung by Homer and the Homerettes in a modern style chorus.
Teen Angel http://www.freedrama.net/teenangel.html
This play has suggestions of 1950's popular songs that can be used with the script.