Open source is more than a licensing model for us: it is a principle of quality and trust. We rely on proven open-source software in our daily work because it is transparent, verifiable, and maintainable in the long term.
Whenever possible, we give something back — through bug reports, improvements, pull requests, and our own tools that can help others too. This matches our standards for solid engineering, collaboration, and sustainable solutions.
As supporters of sovereign IT solutions, we are a supporting member of Codeberg e.V. and publish our own open-source projects on Codeberg.
Our Codeberg profile: https://codeberg.org/cryMG
Our open source projects
cryKeeper
cryKeeper is our open-source human verification service for nginx making bots cry.
cryKeeper uses nginx’s native auth_request module to intercept automated traffic — bots, scrapers, and credential stuffing attacks — before it ever reaches your backend. The actual verification is handled by an external service such as Cap, ALTCHA, or hCaptcha; cryKeeper itself does not implement its own verification logic. Successfully verified visitors receive a signed, stateless cookie so they do not need to solve a challenge on every request.
Key features include:
- Open Source & GDPR-friendly: No tracking, no third-party cookies, full transparency.
- Zero backend overhead: Bots are rejected directly at the nginx level.
- Language agnostic: Works regardless of your stack (static site, Node.js, PHP, Python, …).
- Docker-ready: Deploy in seconds via Docker Compose.
Repository: https://codeberg.org/cryMG/cryKeeper
cryTemplate
cryTemplate is a lightweight template engine with zero runtime dependencies for JavaScript and TypeScript. Interpolations are HTML-escaped by default and templates cannot execute arbitrary JavaScript – just string magic with interpolation, control flow, iteration, filters, and HTML escaping. 🪄
Project page: https://crymg.codeberg.page/cryTemplate/
Repository: https://codeberg.org/cryMG/cryTemplate
VSCode Extension: cryTemplate Language Support
OpenVSX Extension: cryTemplate Language Support
Website Link Checker
A fast CLI tool to check links on websites. It recursively scans internal pages of a website and verifies external links.
Repository: https://codeberg.org/cryMG/website-link-checker
Open source contributions
We also support other open-source projects by reporting bugs, suggesting improvements, and contributing code.
Some projects we have contributed to:
- TSOA - OpenAPI-compliant REST APIs using TypeScript and Node
- Piler - Open-source email archival application
- CrowdSec lua-cs-bouncer - Lua module to allow an IP (or not) from the CrowdSec API
- Giscus - A comments system powered by GitHub Discussions