Hamish Henderson's song "The Freedom Come-All-Ye" is based on a 3/4 pipe march. But he adapted it by making the last bar of each line 4/4.

The Shetland fiddle tune "Doon da Rooth" is a basically a jig (a variant of the Scottish jig "Drown Drouth") but has a weird bit that makes some people notate it in 21/8.