From BlenderWiki

Documentation and help

• Introduction to Game Engine and Starter Tutorial
• About the Game Engine (GE)
• FAQ
• Blender Game Engine Documentation (work-in-progress)

• Game Engine Tutorials

• External tutorials
• User Manual
• GLSL Documentation/Tutorials

• forums (offline help)
• irc (online help and developer forum)

Development

• GameEngineDev
• Looking for Volunteers (coders, artist, documentums writers)
• latest test builds for game engine
• todo list for recently coders
• Wishlist/proposals (voting)
• bug tracker

External links

Game engine Old User Manual

• Blender GameKit

Python

• python download
• python docs for beginner

Game engine python API docs

• Game Logic Python API for Blender 2.34
• Game engine GLSL python APi
• Bullet physics Python API ?

Game engine development tools and utilities

• GIMP - GPL Image Manipulation Program on Linux and Windows
• IconArt - make custom icons for your game.exe
• Setup2go and Installer2go - installer creators
• Inno Setup - a very good free installer
• BZoo - a powerful network game template