Notepad

Amarok - a free and open source music player from KDE projects
- Clementine & Strawberry Music Player are forked from Amarok
Elisa - another fantastic music player developed by KDE.
KDevelop - KDE IDE compatible with several programming languages
Kate - KDE Advanced Text Editor
Kile - the LaTeX front-end
KAlgebra - mathematical graphing calculator based on MathML
Cantor - KDE scientific statistics and math analysis tool