I am and all my life have been a Linux user, I have nothing against Windows or MacOS, I just like Linux, and lately I have been experimenting with Windows in a virtual machine and I don't really know much open source software there apart from the one that is cross-platform like Firefox or Joplin.
At the moment I know:
Flow Launcher: It's a typical rofi style launcher, although I'm not a TWM user I like to just press super and type the first letters of the program I'm looking for to open it.
Lively Wallpaper: A program to have animated wallpapers, in the style of Wallpaper Engine.
Edit: I want to clarify that I read all the comments, I only respond to some because many times I have nothing to contribute to many of them because I don't know what to comment. Thanks to all of you for providing your lists of programs, I will be sure to try as many as I can because they are great, at least I know what to install if I use Windows one day!
That's a good list!
I use the same, except I use LibreWolf (privacy focused fork of FF) and VS Code instead of Firefox and Notepad++
I would actually recommend VSCodium; it's the same product but without the Microsoft telemetry.
Does it lose any MS connected features? Other than surveillance.
VSCodium can't use the official Microsoft extension marketplace, but there is an alternative. You can also install extensions manually.
Yeah VS Code definitely if ya doing programming. I'm just editing config/ini files once in a while so N++ is just right for me.