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

Recent changes:

*PLEASE NOTE!** Any reports of hanging or freezing after quitting the app is due to a bug in the HTC Evo 4G 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. Please contact their support and encourage them to fix, Thanks!

Lots of fixes in this release - Full change logs on the dev website forums!