I used to have one of the $$$ wheelbearing sockets and also the brake caliper wrench for the rear brakes for the HMMWV's. Also the brake caliper socket for the SUSV's. Not sure what happened to them though.
GM torsion bar tool.
Chainsaw tachometer.
Ford 3V sparkplug extractor kit.
GM 6.2L/6.5L glowplug puller/extractor.
GM 6.5L injection pump timing stop.
GM 3.1/3.4/3.8L engine tilting tool.
Ford modular engine lifting brackets.
Assorted seal drivers.
I'm sure I've got more around here somewhere.
Seal installers/seal extractors for FWD transmissions.
Pulley holders/fan clutch wrench.
We could go nuts with diesel specialty tools...
Cat engine turning tool/holder.
Cummins engine turning tool.
Duo-cone seal installer for Cat motorgraders.
Front crank seal installer for C7 Cat engines.
6in/lb torque wrench for Cummins valve setup/jake brakes.
Cylinder liner height gauge for use during inframe rebuilds.
Most of the other diesel tools I use are shop supplied.