The main trunk is:

•  http://www.bitbucket.org/aafshar/pida-main

Currently the following developer repos exist:

•  List of all forks

•  http://www.bitbucket.org/RonnyPfannschmidt/pida-hacks
•  http://www.bitbucket.org/poelzi/pida-poelzi
•  http://www.bitbucket.org/teberle/pida

If you want to start read GettingStartedWithHackingPida first.