I used to steam but only on a pot of water on our cook stove and some aluminum foil. I did make up a steaming system with 8" galvanized duct pipe but never used it and a few years ago I gave it away.
Eric's tillering Gizmo is a great tool and I altered his idea and made it double use by adding 2 dowels on the opposite side so I could screw the pencil from the other side and made it a tool for finding the center line of a stave.
I have 2 or 3 reflex cauls but also a few for different degrees of recurving, one for reflexing one limb at a time and a small one fro removing crooks in a limb.
Most of my other tools are the standard, run of the mill bow building tools, ie. bandsaw, different size and coarseness rasps, a few different scrapers(straight and goose neck), chainsaw files, 6" to 8" flexible rules, tape measure and a 5 gallon bucket to carry it all in when it's not on my work bench.
I built a shaving horse years ago and a few years ago got one of Keenan's Stave Masters, best investment, next to my bandsaw.