I am a coder. I like writing code. Probably too much. My biggest problem when it comes to coding is suffering from Not Invented Here syndrome. This is when a programmer prefers to write his own code instead of using third-party libraries. There are a lot of really good low-cost (some even free) game engines and game-related libraries out there. When it comes to cross-platform development, the big problem with developing your own cross-platform engine or library is testing. When each of the platform that you wish to support also has a wide variety of devices with different specs, it is clear that this is not a good idea for a one-to-three person team to attempt. Instead I am going to be looking at existing tools and engines to use for my cross-platform projects. The list of platforms I am looking at is a lot larger than anticipated as I have acquired a lot of game making tools the last few weeks.
I found AGK 2.0 (App Game Kit) on Kickstarter a few months ago and should be getting a beta of this library fairly soon. This is an interesting tool as it comes with a BASIC language compiler as well as a C++ library so you can use either language. Their BASIC does not seem to have any Object Oriented extensions in it so I would probably only use it for rapid prototyping, with C++ being my development language. It supports a variety of platforms with Windows, OSX, Android and IOS on the list so clearly meets my needs. Once the beta is in my hands, I will be able to better decide but on paper this looks like a good choice.
While looking into AGK, I discovered FPS Creator Reloaded as well as the original FPS Creator. As these came with a large number of free model packs, I figured I would grab them if only for the extra models. While Reloaded looks like a neat tool, especially if they use Lua as their scripting language, it is sadly Windows-only. For game-jams it might be a handy tool so I may end up playing around with it.
The above is more than enough but the Steam autumn sale had RPG Maker XV Ace on sale for 75% off so I had to grab it. This is Windows-only but might be great for prototyping. Right after acquiring this, Humble-Bundle had a bundle that included Multimedia Fusion 2, a game maker I had never heard of but that has optional cross-platform support modules. Then there is Game-maker pro, but unless there is an extremely good deal on the masters bundle this is just not worthwhile for me but my experimentation with the free version showed me that this tool has a lot of power. These are just the tools that I have access to at the moment. There are many additional tools that are available to those willing to look for them.