Languages
Anki
An intelligent spaced-repetition memory training program
Artha
Handy thesaurus based on WordNet
BibleTime
An easy to use bible study tool
E-book reader
FBReader E-book reader
Ho22bus
Recite word easily
Kana test
Drill game to learn Japanese kana characters
Kanagram
Letter Order Game
KBibTeX
KDE-based editor for bibliographic files
KHangMan
Hangman Game
Kiten
Japanese Reference and Study Tool
KLettres
Learn The Alphabet
KWordQuiz
Flash Card Trainer