Hyprland So much fun
RetroArch/M64Plus FZ
Neovim(astronvim ftw), Firefox,
ReVanced. I love my ad-free, sponsor-blocking, Shorts-removing YouTube experience.
As a bonus, I also enjoy using Mp3tag. It’s a program I can use to easily change and update the tags on all my music files, and it can even do it all in batches. It can also connect to various music services (Discogs, Musicbrainz, etc.) to get music tag info directly so you don’t have to type it all in manually.
Linux, Tor, and the Ballistica game engine/BombSquad game (not fully open source as stuff used for sensitive data remains closed source 😔)
Edit: forgot git lol
OBS is my one of my favorite softwares in general, let alone open source
VS Code
linux
Not entirely software, but the MiSTer FPGA project. Having accurate zero-lag hardware accurate versions of almost every console, many arcade games, PCs (Amiga, Commodore etc), and handheld up to and including the PlayStation in a box the size of a game boy is unreal.
Majority of the project is open source, and has been used for ports to the analogue pocket handheld, which I also have and use often
Godot!
How can it be one? GNU/Linux, Firefox, EMACS, Ardour, Vitalium, SurgeXT, KX Studio (OK, this is repo), Carla, Gnome, Debian, MX Linux, XFCE, KDE Plasma, GIMP I am absolutely sure I am missing more s/w packages that I love but don’t come to mind.
Thunderbird. Hasn’t bugged on me once.
No love for VLC player?!?
Blender, by far :)
SQLite. Probably the most widely used open-source library in the world. Pretty much every computer, phone, tablet, and a lot of embedded systems, all use it.