Anjuta
Arduino IDE
Code::Blocks IDE
eric6
eric6 Web Browser (QtWebKit)
FLUID
Fritzing
Gambas3
Geany
Glade
Godot Engine
Lazarus (2.0.10)
Builder
Cuttlefish
KDevelop
KDevelop PHP Support
KDevelop Python Support
Plasma Engine Explorer
Plasma Global Theme Explorer
Plasma Theme Explorer
Plasmoid Viewer
jupp, the Editor which sucks less
Qt Creator