Here are some of the resources shared on Saturday’s launch of the Hackforge Summer Games contest. Share yours in the comments! 

Randy McGall’s List

Anthony Garreffa’s Game Loop Presentation & Materials

Doug Sartori’s Presentation & Code

HTML5 Game Development Resources by Jeff Szusz

Choosing an Engine

Other Resources

Popular Engines

Other resources 

Video game engines for young people ages 8 and up

Sell your game

Game Art Resources

UPDATE:
Big thanks to Jessica Lowe and her computer science class in California for recommending this resource