So I've been considering how to encourage some gameful participation, and I decided a gaming resource list might be a good place to start. It seems like a lot of people come here really encouraged by using games to create change, and maybe they have a great idea for a game they want to create, but they have no idea where to get started. So for everyone that wants help let me start by saying, almost anything you want to do can be accomplished on your own. I'm not saying you can't get help. That's what a community is for. But if you can't find the help you need right now, don't let that get you frustrated. There are plenty of guides and tutorials out there that you can piece together to build just about anything you want. Here are some resources to get you started, and I encourage everyone to add their own resources in the comments.
2. Code School
This is a really in depth free course on programming in general. The creator is also working a series of tutorials for programming games that should be out early 2013 so look out for that. It doesn't cover the processing software listed above, but processing is based on Java which is does cover.
This is a great set of tutorials on how to make tile based games which make for easy appearance design and scalability. Unfortunately all the code is done in flash which is proprietary software, but I did find a list of open source alternatives. These tutorials are also licensed under a CC license, so my goal is to eventually convert them to processing.
Just because you call something a game, doesn't mean people will want to play. You need to incorporate game mechanics that draw the players in. I just found this list of game mechanics ideas, so I can't vouch for it yet, but it might be a good starting point.
That's the start of a list. Add more and feel free to post any questions you might have about the list above.