Posting before reading because activity. Godot Engine, hands down. I used Unity for years and years and now that Godot 4.x is out, I'll probably never use Unity again. Unless it's for a job or something like that. All personal projects tho... I could probably make a game in Godot while waiting for Unity to start up.

GCC, back in the days DJGPP in particular. As a child in the 1990s I could not afford the big name compilers like Watcom. And compared to DJGPP, all the “prized” Borland/Turbo stuff that my middle school pushed (with segmented real mode), were practically Fisher-Price and Mattel compilers.

I really like to use Shotcut for video editing and Audacity for audio related things.

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.

I'll skip all the already mentioned ones and go for a less known one, EasyTag.

I used it to organise the tags in my music collection. Super useful as you can batch fill in tags based on file structure (like author/album/song) or do the reverse and sort files in a file structure based on tags.