Signal, Thunderbird and Bitwarden
LibreOffice is equal to any office software out there, and has been much more stable than OpenOffice, and works without an internet connection unlike Google Docs.
Since major projects like Firefox keep getting mentioned, I’ll throw a shout out to Ant Renamer.
It’s simple, it’s FOSS, and it just works. I often - ahem - acquire a number of files from various sources that are labeled like “Mission.Impossible.7.Complete.zHD.2022.xReloadedx”, and an application like Ant Renamer can batch rename files into whatever you need.
For example, if I need to backup or copy a set of game saves in a folder that all need to have the same prefix like N007 from N002, I would have to manually change 10K files from one prefix to the other. Ant Renamer can do everything in a batch that runs quicker than the blink of an eye.
So, Ant Renamer for the win!
Gonna go with Firefox as both my most-used piece of open-source software, and the software I see as most important to its ecosystem. If Firefox fails then we’ve just got Chromium-based browsers and, I guess, Safari.
uBlock Origin, it’s not even close!
Not one per se, but I love when a piece of open source software absolutely destroys it’s competition. I’m not talking Firefox vs. Chrome or Unity vs. Godot debate (both are better, don’t @ me), I’m talking when it’s not even close, the open alternative is just industry standard.
VLC, Calibre, OBS and maybe Blender come to mind.
any video player really - though what’s doing the hard work behind the scenes is ffmpeg, which is foss as well
I love and use Bitwarden daily.
Freecad is pretty powerful, and fully functional now that they figured out their topological naming problem.
