• Thumb-Key — A flick keyboard for mobile phones; a FOSS alternative to MessagEase created by Lemmy's own Dessalines. It's not perfect, neither was MessagEase, but for what it is it's pretty damn good and definitely beats using a mobile QWERTY keyboard.
• Ibis — A federated wiki created by Lemmy's own Nutomic. It's currently pretty barebones with little activity, but I'd like to see more interest in the project so that it can grow and improve. I think it has a lot of potential.

Gnu Guix. By default Guix uses only free libre software, but there are ways to install it with a non-free kernal. Systemcrafters has a guide (this is what I used) as well as non-guix (guix repo for non free software).

Thanks for making me feel like an idiot for not knowing things after age 30.

I am surprised that no one mentions this.

Firefly III this is an amazing financial tracking and budgeting tool that literally saves me so much time and money, I even donate monthly since it's so good and essential to me that I think it's only fair that the developer gets something back.

Helix is a modal text editor, but I haven't used it as much as I'd like because it lacks the plugins I use in Neovim.

Vorta is a great program for backing up files. Works on Windows, Mac, and Linux.

Couple I've come across recently and haven't seen here yet:

micro - a nano-style terminal text editor with modern features and plugins.

termscp - a terminal FTP (et al) client heavily inspired by WinSCP.

linux

A more private and secure messenger than WhatsApp, signal and telegram, like simplex

MusicBrainz Picard

Amazing music tagger and batch renamer, for those of us who still have all our music as files.

Typst, Nix, Git, Blender

xpra: it is like tmux but for X windows (works on wayland), but it can do much more than that. You can seamlessly run GUI programs from a container or VM on your main desktop while still sandboxing their X capabilities, forward windows from Windows desktops, and it has efficient encoding so it is usable over poor connections as well.

For 3D Modelling / Printing, if you have even a little bit of programming / scripting ability, OpenSCAD is amazing.

It's basically just a small scripting language for generating 3D objects and performing 3D modelling operations and its so handy to be able to store important info as precise variables, and create new objects and cuts and stuff just with for loops and if statements.

I use the web version a lot of the time, and while it could use a little work, it's pretty amazing.

ViMusic, android APK to play music from youtube, Ive just come across it when I wanted to listen to some OST that were only on youtube and my phone by default doesn't let me play youtube and block the screen. Im not gonna pay any subscriptions ever.

Shutter encoder, it has a ton of useful tools built in for quick video conversion, compression, trimming, etc, and it works very well for batch encoding of a lot of different video files

Affine, its a surprisingly feature rich notes app (open source but all cloud features are currently paid)

KopiaUI, an easy to use automatic backup program

More people should code Csound. Doesn't matter if you're musically inclined or not. Just do it. Make weird noises. Have fun!

More of a couple of features. Python venv makes it much easier to work with third-party libraries. That said, the standard library is fantastic for everything from parsing json to subnetting to quick regex searches.