Croggon has also written libretti for Michael Smetanin's operas Gauguin: A Synthetic Life and The Burrow, which premiered respectively at the 2000 Melbourne Festival and Perth Festival, produced by ChamberMade.[7][8] In 2014, Iain Grandage (composer) and Croggon (librettist) collaborated to present The Riders, based on Tim Winton's novel The Riders. Its world premiere was in Melbourne.[9]
Other poems by Croggon have been set to music by Smetanin, Christine McCombe, Margaret Legge-Wilkinson, and Andrée Greenwell.[10] Her plays have been produced by the Melbourne Festival, The Red Shed Company (Adelaide) and ABC Radio.