Requirements: All Android Version, supports App2SD
Price: $4.81
Overview: See what your car is doing!! Torque is a vehicle / car performance / diagnostics tool that uses Bluetooth ELM/OBD/PLX adapters to connect to your OBD2 engine management / ECU
More features added every release - there are forums at here
What's in this version:
*PLEASE NOTE!* Any reports of hanging or reboots after quitting the app is due to a bug in HTC devices and Galaxy Tab,this can be triggered by using the Pandora app. Disabling Pandoras new bluetooth settings fixes the problem, but HTC/Samsung need to release a fix.
Changes:

Crash on start fix
2 new display types (beta)
Fault code updates