How do you mean?
There’s also Webkit, which a few foss browsers (ie gnome web, and whatever kde’s browser is called) use instead of Chromium or Gecko, and Swift, a c++ based language that I haven’t personally seen used much outside of iOS development.
I don’t like Apple tho (:
Don’t forget Del
I use Pulse SMS. It has cross platform sybc for every major os, and has a decent feature set. Pretty sure its an electron app though.
Gears and cams, the firmest of ware.
I’ve heard good things about Peppermint, and I personally think Bodhi is neat.
I take a similar approach to my compositions and arrangements on Musescore. Anyone can download the sheet music file and edit it, and most everything I do is under Creative Commons attribution/noncommercial. A lot of other Musescore users do this, it allows for a lot more accessible and free sheet music of both modern and classical music.
According to the website, not open source. There are licensing issues with what remains of Commodore.