Mondrian: Guido van Rossum’s first Google project
Guido van Rossum unveiled his first Google project, Mondrian, tonight during a Python tech talk at the Google campus in Mountain View. Mondrian is a web-based code review system built on top of a Perforce and BigTable backend with a Python-powered front-end. Mondrian is a pretty impressive system and is currently in use across Google.
Link.
(Guido van Rossum is the creator of the Python language).