Open Source Car Computer – Source Code
Python SDK – Contains OBD2 data logger, GPS logger, and setup script for the Raspberry Pi. This runs on the Pi when your car is running.
Database Storage and API – MySQL database tables and web APIs in PHP using JSON. The SDK talks to the API to store the data off the Pi and onto the server.
pyOBD – This is THE open source OBD2 Python library from which there have been countless forks and individual github copies.