www.scangage.com

Standalone; no export to PC. Realtime display of 4 parameters simultaneously, log of all others for trip and day. Its a simple LCD text display, so no dyno graphing. And no data export. I emailed them, and they said it was unlikely they would add export capability- price vs demand. But it could probably be hacked.

The best part of this particular scanner is its small form factor, and it works for all the standards- Ford, GM, and Chrysler/foreign. So you can hit all your vehicles without buying separate software or parts. But no trending/export.