Trouble Code Lookup - http://www.actron.com/code_lookup.php
Trouble Code Definitions - http://www.iequus.com/support/obd2_definitions.php
OBD2 connector location - http://www.obdclearinghouse.com/oemdb/
Elm Electronics OBD2 Chips - http://www.elmelectronics.com/
TunerTools.com - http://www.tunertools.com
OBD-Codes.com - http://www.obd-codes.com
OBD2 Crazy - http://www.obd2crazy.com
Multiplex Engineering - http://www.multiplex-engineering.com/
Proscan - http://www.myscantool.com/
EFILive - http://www.efilive.com/
Trouble Code Chart - http://www.troublecodes.net/
Custom PCM/ECM Programming - http://www.madz28.com/
Custom TBI/TPI Chips - http://www.tbichips.com/
Custom PCM/ECM Chips - http://www.pcmforless.com/
LS1-Edit - http://www.carputing.com/
HPTuners - http://www.hptuners.com/
Sunspeed Lotus Honda conversions - http://www.sunspeed.com/OBD2.htm
Romulator - http://secure.transtronics.com/osc/index.php