Leandro Santiago mentions in the forum:
"My favorite feature in kdevelop is the quickopen form. It saves me lots of time :-)
Another feature I love is the colorful syntax highlight. It's an incentive to write beautiful code :-)"
Kenneth Perry writes in the forum:
"Definitely for me, the biggest features are the CMake and Doxygen support : both of which I use heavily. Makes me feel the time spent documenting everything was worth it ;). That, and the ability to jump quickly to a function's declaration or definition from the exact same popup."
"Love the VI input mode! Great static code analysis and C++ support. Much thanks for basic Makefile support as well."
Also visible: class browser
"The best code highlighting in an IDE, ever (At least IMHO). And it even tweaks the colors to match the current KDE color scheme :)"
Also visible: integrated search & replace functionality
Here you can see the "create class" wizard in action. The page shown offers you a list of overloadable functions from the parent classes.
When you change a signature in either the declaration or definition of a function, KDevelop will show an assistant at the bottom of the editor. Pressing the button or hitting "ALT + [NUM]" triggers the assistant and it will update the signature in the other location automatically.
This image shows a full completion list in a C++ document.