Somewhat off topic... Engine Diag Software?

[PC Handyman]

Does anyone know where I could find some engine Diagnostic software that will
run on the PC and could potentially plug in to various OBD systems, etc.? I have
seen the Snap-On one, as well as the Carsoft for BMW/Mercedes, but what I would
prefer is something based on a laptop that would still take the OBD plugs, and
maybe even have a few sensors...

Any Ideas, Experiences?


-Noah