Recommend a tool you like that is not mainly used for leathercraft

[zuludog]

A corkscrew!

This is an invaluable tool for obtaining protective covers for awls. But then you have to do something with the surplus materials.............

[PastorBob]

I bought a set of brass punches of various sizes from Harbor freight.  I have a couple in the leather shop.  One is perfectly sized for the large tandy stamps to use as a handle.

[JayEhl]

Boy these area all super ideas, especially for us new guys.   This thread should've been titled "Leather Worker Hacks! "  I know it's not earth shattering but I glued on different grit sand paper to (free) paint stirrers that I've picked up at the local hardware stores.  That way I have different grits on a block ready to sand long edges.  For smaller tinier areas I like the chopstick and bbq skewer ideas.      Ya'all keep these coming! 

[tsunkasapa]

I like a spokeshave for skiving belts and other straps.

[scrapyarddog]

PVC pipes of various sizes. I use them for round box stitching, to glue exterior and lining of bag flaps (to make sure the finish product naturally bends a certain way), to make handles.