I have a few scan tools and adding more as deals come around.
Chrysler DRB 3 enough said.
Ford Rotunda/Hickok Next Generation Star Tester - Ford dealership scan tool, Same idea as the DRB3 for Chrysler
OTC Genisys This scan tool is used by most private repair shops. It does engine, ABS, airbag scans among many other things on North and South American, Asian and European cars. It also scans transport trucks. It also does flash programming on GM cars, but unlike the dealership scan tools it will not program keys or key fobs.
Autoxray 6000 This is a a high end consumer level scan tool which will scan OBD2 generic and factory engine and transmission codes on North American and Asian made cars from the 1980's to present. It also has a handy dandy battery tester.