Yes. The Halloween gambit is one.
Are there any gambits where you sack a piece?

I know of gambits where you sac a pawn, but not a piece or higher.
Yes, there are quite a few. Some are even more or less sound.


Petroff Chocrane gambit, Halloween gambit, King's Gambit Muzio just to name a few with e4-e5. There are piece sacs in the Najdorf. Not to mention some of the sharp Semi Slav lines if i'm not mistaken.
I know of gambits where you sac a pawn, but not a piece or higher.