The official C++ Weekly Repository. Code samples and notes of future / past episodes will land here at various times. PR's will be accepted in some cases.
https://code.google.com/archive/p/emptycrategameengine/ (2008) this was designed to provide a collaborative method of game development, via Drupal. I used it in a small series of adventure games with very short gameplay, but stopped after a few episodes. You used Drupal to set up objects/rooms/assets, which generated JSON files, which were executed by a flash/actionscript app
My personal history of attempting / desiring to build a computer game.