PlayStation 3 Projects Source Code for PS3 Developers by MrNiato | PSXHAX - PSXHACKS
RPCS3: an experimental open-source Sony PlayStation 3 emulator | Our Code World
Computer Vision for PS3 Games
A look at UDK Ultimate - A modified Unreal Engine 3 SDK with support for exporting to hacked PS3 and XBOX 360 consoles; recently beefed up with PS3HEN support and main developer