It'd make a heckuva lathe motor.
Or a treadmill, for the entire family, with extreme uphill settings.
If you have a need to cut a lot of wood, perhaps a sawmill.
If you have a lot of wind, or water, it could also be used as a generator.
If I had one here, I'd work out how to make a differential to drive the rear of my trike with it, geared down so I could pull a bus full of people (or a series of trailers full of dogs, dogfood, pianos, and everything else I've hauled separately).
Would probably take me a long time to design around, though, so the drivetrain would take the torque and the frame would take the strain.