I don't have a list but some things that come to mind, and I am sure folks with chime in with additions:
Full set of hand tools - I carry both metric and SAE, sockets and box set, allen wrenches
Make sure to include #1 and #2 square drive bits
electric drill
Electrical tools - stripper, cutters, soldering iron, heatshrink lighter, heatshrink butt connectors
Full set of spare fuses, I need to augment this some what to include the fusible battery links
Clamp on multimeter, extra wire to extend leads
Spare prop, nut and cotter pin
Spare fuel filters (3) Cuz if you need one your gonna need more
Wiper blades
Spare set of keys, engine and door
More for sure but this is what I can remember at this point