Here are some resources for creating games. Feel free to reply with more suggestions or offers to contribute, and I'll update the list accordingly.
Note: These are just suggestions to help you out. Don't feel like you're required to use any of the following.
Sortingh.at is a great site if you want to get into game development, but have no idea where to start. It gives suggestions for game making programs, as well as other resources such as art and sound assets. I strongly recommend looking at it before you start.
Game Making Programs:
These are programs for making the actual game. Programs I've marked with "(free)" are totally free, while others cost money for the full versions (but have free versions available).
- Twine (free) - A text-based program, and a great way for beginners to start creating interactive stories and games. Simple to learn, especially with a tutorial. Note that version 1.4.2 is way easier to use than version 2.0.11, especially if you want to add pictures or anything like that. This is what I used to make Clowning Around.
- Inform 7 (free) - Another text-based program, and a little more complicated and versatile than Twine. It has in-built tutorials, but I also found these ones really handy. This is what I used to make Impetum Maleficus and Endless Sands.
- GameMaker: Studio - Great for making 2D games, GM:S uses its own system that requires little to no coding knowledge to use. There are plenty of tutorials on the website. This is what I used to make Spirit Smooches.
- Unity - I have very limited experience with Unity, it seems very complicated but extremely versatile. If you want to make a 3D game, Unity is probably the way to go!
- Construct 2 - I haven't personally used Construct 2, but I gather it is similar to GameMaker: Studio in many ways.
- RPG Maker - I also haven't used RPG Maker, but it seems like a good way to make games without having to worry so much about art and sound assets (since it comes with a bunch, and more are available on the website).
- Adventure Game Studio (free) - Again, I've never used this program, but it seems like a good option for creating point-and-click adventure games. As an added bonus, it's completely free!
- Clickteam Fusion 2.5 - Once again, I've never used this one before. But I've heard good things about it!
- The Godot Engine (free) - I've never used it, but it seems to have a great toolset. It's open source too, so there are plenty of extra features, and with a little know-how you can add more.
- Superpowers (free) - Another open source program that is apparently easy to get started with, and allows your game to be played in a browser.
Art Assets:
Unless otherwise noted, these assets are royalty-free. However, before using art assets in your game, make sure to check the sites for the correct way to credit the artists.
- Open Game Art - Lots of neat art, particularly for low-graphics games.
Music Assets:
As above, these assets are royalty-free, but must be credited correctly.
- Incompetech - Lots of great music for various themes.
Additionally, some lovely people have made posts here offering to make some custom music for free, for use in this jam. If you want to include music, definitely hit them up!