Osage Orange (another name) has a lot of uses. It is great for back and sides on a guitar. Duck calls were mentioned and I'll also add turkey calls.......probably the loudest call I've ever heard was made from "Bodarc" (Bois De'Arc). The use for building bows and wood turning has already been mentioned.
A co-worker of mine grew up in Kansas and they had a homebuilt pit made from stone that looked like the remains of an old chimney in the pictures he showed me. It was a vertical type smoker. Anyhow, they used Bodarc in it all the time for smoking and they loved it!
If anyone knows of a an Osage Orange tree near NW Arkansas with a large diameter trunk (say 24" diameter or better) that someone wants cut, I would be interested to use for building guitars. The limb wood can be used for a smoking!
OK Joe Vertical Smoker, UDS, Komado Acorn, Weber Kettle Ranch, Weber Kettle, Stok Kettle