Game development-related:
YoYogames – The home of GameMaker, one of the easiest easiest programs to learn when it comes to game development. Warmly recommended.
Dead-code – the home of Wintermute, another useful game engine.
Friends, allies and general partners in crime:
Victor Eriksson – Game Design
Pontus NovĂ©n – Graphics
Matilda von Matern – Graphics