# Open Source

- [Kino](/opensource/kino.md) — A high-performance Ractor web server for Ruby 4.0+: Rack 3-based, with a Rust Tokio/Hyper front end, Ractor-parallel Ruby workers, and a threaded fallback mode.
- [Bundlebun](/opensource/bundlebun.md) — Bundles Bun—a fast JavaScript runtime, package manager, and builder—with Ruby and Rails applications.
- [Carbon Fiber](/opensource/carbon_fiber.md) — A high-performance Ruby Fiber scheduler powered by Zig and libxev.
- [Inkmark](/opensource/inkmark.md) — A very fast, feature-packed, AI-first Markdown (CommonMark/GFM) gem for Ruby, built on pulldown-cmark.
- [Callback Hell](/opensource/callback_hell.md) — Analyzes Rails application models and provides actionable insights on callbacks and validations.
- [astro-slop](/opensource/astro-slop.md) — Astro integration for LLMs: markdown versions of every page, llms.txt, and alternate links.
- [astro-nice-asset-filenames](/opensource/astro-nice-asset-filenames.md) — Astro integration for short, readable asset URLs.