Favorite? Hm... I would have to say Codeigniter (PHP framework) but I love these projects as well: Linux/GNU, VLC, LibreOffice, qBittorrent, VSCodium, Filezilla, GIMP, Firefox, Wireguard, GrapheneOS, Matrix, F-Droid.

If I won the lottery I'd donate to these projects or their respective foundations.

GNU/Linux Bitcoin core LND lightning LNDg

In terms of what I use daily

• GNU Guix package manager
• Kate text editor
• Quassel chat client
• KeePassXC and KeePassDX password managers
• GNU IceCat browser (Firefox ESR derivative)
• VLC media player

Foss open source, or open source after Stallmans deffinition?

If the first one I'll go for the GNU/Linux OS

• godot engine

• dungeon crawl stone soup

• ncdu

I got sick of corporations forcing restrictions so looked into alternatives. Learned how to do it myself & haven't looked back:

Joplin notes - use this every day synced to multiple devices Nextcloud - self hosted on a Raspberry Pi 4. Cloud storage plus syncs multiple stuff including Joplin

So many brilliant options on mobile: OsmAnd+ (nav), Antennapod (podcasts), Keepass (password manager), Obtainium (app updater). Was also enjoying Fritter/Quacker (Twitter without needing an account) until Elons recent meltdown. Also enjoying Liftoff lemmy app for Android

EDIT: hot off the press. For those interested, Quacker is back in the game. Not had chance to check Fritter yet

Ardour

Linux

Linux, Firefox, OBS, Emacs, Hatari

Arch Linux, LibreWolf & KeepassXC are the first that come to mind.

rust

Linux

• Duplicati: A backup software that securely stores and restores data across various platforms and cloud services. Supports encryption and incremental backups (versioning). Lots of possibilities, but use it to back up my PC to my NAS and the other way around.

• Ferdium: Messaging and other services combined in a single interface. Using it for Telegram, Whatsapp and services like Home Assistant etc. Allows apps to hibernate when not in use.

• OpenRGB: Control and customize RGB lighting effects on various computer hardware components.

• Firefox

Firefox, Bitwarden, and Tachiyomi are some that I use almost everyday

linux

Thunderbird. Hasn't bugged on me once.

Would probably say Firefox, but since many others have already mentioned it, I'll go with Nushell

Favourite, not sure. Maybe my "favourite" would be the one which would be the hardest to replace with something I like.

There wouldn't be something i can think off that could be irreplaceable. However the hardest thing I like may be FanControl.

For the browser, Firefox is very nice, but it's "just" a browser if you think about it. There is brave, and other open source chromium alternatives if it disappears.

For mail clients, I also like the Mailspring design, however Thunderbird just got a new skin and damn it looks good too.

And for the rest, I don't really know. Either I don't remember right now, or no special "like" for the software. Or I like the closed source software convenience more (I may also have no idea of an open source alternative, or an equivalent in features open source).

It depends on the usage really.

Hard to answer but maybe Haiku or GNU Emacs

Linux, of course. But another one that I use all the time, and love to death, is SageMath. It's the perfect blend of mathematics and programming for me.