Reaper Audio Workstation (Windows/Mac/Linux) is a digital audio workstation (DAW) from the original creators of Winamp, notable because they did a lot in figuring out mp3 compression, so they know digital audio. The design is also what I'd call "Winamp, but for professionals" which is just some extra fun (yes - they do have skins!)
The app itself can be a basic no-frills multi-channel mixer, or a full composition suite with as many tracks as your machine can handle. The interface is very customizable so even though there is about 1000 tools in it, you can bring the ones you use the most to the fore. It comes with a set of basic plugins out of the box - tone generator, basic synth, wavetable synth, effects, eq, etc that are relatively good. It also compatible with any vst/vsti instruments I've thrown at it so far.
If you are already familiar with DAWs and recording audio, adapting to Reaper is pretty easy - especially if you are coming from ProTools or Cubase. If you are coming from Garage Band or something similar, Reaper might not be the best choice to start with unless you are ready to roll up your sleeves and learn about audio production - but you can say the same about any professional DAW really.
That said, they have TONS of support and resources available, including training videos, tutorials, and a 400+ page user guide. You won't need all of it, but if you need help, you will find it.
The main draw is the price. Reaper's Commercial License is $225 which is a steal compared to most DAWs, especially if they are locked into specific hardware (like ProTools) or are on some shitty subscription model. The "discounted" license for individuals is $60 which in the world of music production is essentially free. It's also priced like old-school software, so what you pay is flat for the version you purchased. You can buy the next version that comes out or stick with the one you bought, your license works forever for that version.
VSCodium (Windows/Mac/Linux) is VSCode, one of the best modern IDEs, but without most the shit that makes it suck - mainly M$ itself. Free (as in freedom)
and free of cost.
Heroic Games Launcher (Windows/Mac/Linux) is
another game launcher - because you want another one of those! It's lets you combine and manage your GOG, Epic, and Amazon libraries. For those that use Proton, it will also allow you to manage your Proton versions and will automatically set up your games properly for running with Proton. Also has a handy "Add to steam" button which adds a game shortcut to your steam library.
If you run the game through Steam, Heroic quietly starts up in the background so it can start your game and then closes so it feels way less intrusive than publisher made game launchers. It's my go-to for managing my GOG library. Fuck Epic and Amazon, but they are there if you need them. Free and open source.