macOS app that uses your Mac's camera to monitor when you're slouching.


macOS app to quickly change the brightness of your Mac.


Sticky Notes for Scrapbox

  • TypeScript, React, Electron, Webpack


Chrome extension for quick tab switching and bookmark access.

  • TypeScript, React, Redux, Webpack
  • GitHub

Period Recorder

Battle recorder for smartphone game “Last Period”.

  • Ruby, Ruby on Rails, MySQL, Chef, CentOS
  • Google App Engine, Cloud Run, Cloud Storage

Last Period Tools

Tools for smartphone game “Last Period”.

  • TypeScript, React

Riverflow (obsolete)

macOS app that enables you to control your Mac with two-finger gestures.

PopHub (obsolete)

GitHub feed reader that pops up from your Mac's menu bar.