The Basement Coders — small, useful apps, made with care.

OpenKanji

Learn JLPT kanji — write, quiz, and study with spaced repetition. Offline.

Copybook

Dots and boxes — play the computer or a friend on one phone. Offline.

Crosshatch

Nonogram puzzles — every picture solvable by logic alone. Offline.

Inkstone

Five in a row — the rules marked on the board as you play. Offline.