jupp, programmer’s editor — jstar (old, pre-jupp, WordStar) flavour
jupp, the Editor which sucks less
SurgeScript
Qt Creator
Game Conqueror
PulseView
Thonny
Zeal
PCB Calculator
gEDA PCB
Pcbnew (Standalone)
Projucer
Proof General
QGit
regexxer Search Tool
RenderDoc
Robocode
SASM
SciTE Text Editor
Scratch
sdlBasic
SimulIDE
SLUDGE Floor Maker
SLUDGE Project Manager
SLUDGE Sprite Bank Editor