A halfords axle stand inner/top bit is just the right inner diameter and great for seating stubborn crown races on tight (or worse still stepped, like you get on many rigid forks incl my surly one) fitting 1 1/8″ steerers.
Also bearing presses made from various sized sockets, long bolts and nuts.
The Roger Musson d-i-y wheel jig is may favourite home made one but obviously all credit to him for that: Because of the way the jaws are, you can just slot a 10mm allen key in and squeeze the sides/legs together a little bit, (and use the ‘floating’ gauges and a dishing tool for reference) and then put pretty much any hub/axle standard in it, whereas on a shop bought one you would be needing adapters for 10/12/15/20 bolt throughs and so on. I have built onto every hub size going with that stand including 150mm dh and maverick ones.