It’s probably Neovim. I spend most of time in a day while working on it. Its suitable for almost all code and text editing jobs.

Also I should have to add okular which is really nice for reading pdf’s and mangas.

Feren OS, Ive heard it first and dude they use weebly for website.

Debian is Debian based.

According to my experiences; its good for trying kde but just that. I prefer openSUSE tumbleweed over it. Or just Debian Testing with KDE Plasma. (Maybe stable, version 12 is really updated for know.)

Also openSUSE project provide OBS, which is replacement of Aur on Arch.