Extenshi is built on the work of the open-source community. This page credits the projects we ship to your browser or build the product with, and links to their licenses. We preserve every upstream copyright and license notice, and — where a component’s license requires it — we make that component’s own source available. Extenshi’s own application code is proprietary and not covered by these notices. If you believe an attribution is missing or incorrect, email [email protected] and we will fix it.
The cat (Neko.js)
The little cat that wanders across the catalog and blog is Neko.js by Louis Abraham, a faithful port of Neko98 by David Harvey, itself based on the original Neko by Masayuki Koba. It is licensed under the GNU General Public License v3.0.
In keeping with the GPL, we ship Neko.js as a separate, unmodified script with its original copyright and license header intact, and we make that exact source available at /neko.js. It runs as a standalone visual easter egg and is not linked into the rest of the application.
Core stack
Some of the principal open-source projects we build on:
- Next.js — MIT. React framework powering the catalog and blog.
- React — MIT. UI library for our component model.
- Tailwind CSS — MIT. Utility-first styling across the UI.
- Radix UI — MIT. Accessible UI primitives.
- lucide-react — ISC. Icon set used throughout the interface.
- Biome — MIT / Apache-2.0. Linting and formatting toolchain.
Licenses & source availability
Each project above is governed by its own license, linked from its repository. The complete dependency tree, including transitive packages and their licenses, is recorded in our lockfiles. For a copy of the license texts or the corresponding source of any open-source component we distribute, contact [email protected].