Open Source Software Licenses
Open Source License Attribution — Last updated: May 31, 2026
This Site (https://kk.siiiiiixth.com, operated by KK siiiiiixth / 株式会社siiiiiixth) is built using the following open source software and web fonts. In accordance with each license, the copyright notices are listed below. For the full license text, please refer to each linked source.
Runtime Dependencies
Libraries delivered to or executed in the browser or on the server.
| Library | License | Copyright |
|---|---|---|
| Next.js | MIT | © Vercel, Inc. |
| React / React DOM | MIT | © Meta Platforms, Inc. and affiliates |
| Tailwind CSS | MIT | © Tailwind Labs, Inc. |
| Drizzle ORM | Apache-2.0 | © Drizzle Team |
| postgres | Unlicense | © Rasmus Porsager |
| Auth.js (NextAuth) | ISC | © Iain Collins and Auth.js contributors |
| @auth/drizzle-adapter | ISC | © Auth.js contributors |
| @aws-sdk/client-s3 | Apache-2.0 | © Amazon Web Services, Inc. |
| Sharp | Apache-2.0 | © Lovell Fuller and contributors |
| Zod | MIT | © Colin McDonnell |
| ioredis | MIT | © Zihua Li and contributors |
| Resend (Node SDK) | MIT | © Resend |
| @dnd-kit (core / sortable / utilities) | MIT | © Clauderic Demers |
| react-easy-crop | MIT | © Valentin Hervieu |
| react-icons | MIT | © Cam Wiegert |
| qrcode.react | ISC | © Paul O'Shannessy |
| sonner | MIT | © Emil Kowalski |
| otpauth | MIT | © Héctor Molinero Fernández |
| clsx | MIT | © Luke Edwards |
| tailwind-merge | MIT | © Dany Castillo |
Web Fonts
Web fonts delivered by this Site. System fonts (SF Pro / Hiragino Sans, etc. provided by Apple) are not delivered by this Site and are therefore not listed.
| Library | License | Copyright |
|---|---|---|
| Geist / Geist Mono | SIL Open Font License 1.1 | © Vercel, Inc. — Designed by Vercel with Basement Studio |
Development Tools
Tools used only at build/test time (not delivered to users at runtime).
| Library | License | Copyright |
|---|---|---|
| TypeScript | Apache-2.0 | © Microsoft Corporation |
| ESLint | MIT | © OpenJS Foundation and contributors |
| eslint-config-next | MIT | © Vercel, Inc. |
| Vitest | MIT | © 2021 Anthony Fu and Vitest contributors |
| @vitejs/plugin-react | MIT | © Vite contributors |
| @testing-library/react | MIT | © Kent C. Dodds and contributors |
| @testing-library/jest-dom | MIT | © Kent C. Dodds and contributors |
| jsdom | MIT | © jsdom contributors |
| drizzle-kit | MIT | © Drizzle Team |
| @tailwindcss/postcss | MIT | © Tailwind Labs, Inc. |
| husky | MIT | © typicode |
| lint-staged | MIT | © Andrey Okonetchnikov and contributors |
License Texts
In addition to the copyright notices listed on this page, the full license texts can be viewed at the URLs below: