Emacs (GUI)
Emacs (Terminal)
FeatherNotes
FeatherPad
Frescobaldi
Geany
Gobby
GVim
JuffEd text editor
Midnight Commander editor
Mousepad
Neovim
Neovim-Qt
gedit
Kate
KWrite
jupp, programmer’s editor — Emacs flavour
jupp, programmer’s editor — JOE flavour
jupp, programmer’s editor — jpico (pico, GNU nano) flavour
jupp, programmer’s editor — jstar (old, pre-jupp, WordStar) flavour
jupp, the Editor which sucks less
Zim
Pluma
Proof General