Kotoyokai
A chat app for English speakers to learn Japanese by talking with yokai characters.
Tomarigi
A perch for watching your AI agent sessions. Birds show how each session of seven agents, including Claude Code, Codex and Gemini CLI, is doing. Open source.
Rojiura Ayakashi Kassen
A spectator simulation where AI-made local yokai battle across Japan's 47 prefectures. Reply on X to give birth to your prefecture's yokai, and likes make it grow.
agent-boards
Viewers a coding agent opens to show you its work: moodboard for comparing images, textboard for revising text, and reportboard for reading reports. Open source.
Aruki Sumaho
A browser game where you walk while looking at your phone, dodging cars and people. When a notification comes in, you can't look up until you've mashed out a reply.
doodleee
Your drawing starts running under physics and races other players online.
Gyokan
A learning extension that explains the foreign-language text you select, right there, in Japanese.
Majibabu
A joke extension that turns the text on a page into baby talk and more with one click.
UtaNote
Lyrics, chord progressions and tabs in one place. A songwriting app that keeps your ideas from slipping away.