Facebook today released the code behind their application platform. What that entails:
This release includes the API infrastructure, the FQL parser, the FBML parser, and FBJS, as well as implementations of many common methods and tags. We’ve included samples and some dummy data to help you get started fast.
Before releasing their API last year, Facebook bought Parakey, founded by Blake Ross and Joe Hewitt of Firefox fame. I don’t know if this code is actually derived from the unreleased Parakey, or even written by them. For all I know it could have been written by Facebook developers well before they were even acquired. Though if I had to place a bet, I’d guess this is code from Parakey. The code all looks pretty well scrubbed of anything that might give away Facebook secrets.