Interactive Jeopardy English Vocabulary & Grammar

Customizable typing speed test with many modes, word lists and stats; an account is optional.

Shared analysis boards where you annotate games with comments and variations, alone or with others.

Flash Player emulator demo that plays SWF files you load, preserving old browser games and animations.

Sliding tile puzzle where matching numbers merge until you reach 2048.

Tetris implemented with React, playable with keyboard and with a pause feature.

Builds editable fantasy world maps with states, religions, cultures, burgs and routes; exports to image or data files.