# 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.
- [nosj](/opensource/nosj.md) — Pull, push, and fused-cursor JSON parsers plus a streaming writer, SIMD-accelerated (NEON, SSE2, runtime-detected AVX2), for hosts that build native values during the parse.
- [gem nosj](/opensource/nosj-ruby.md) — A fast, json-gem-compatible JSON parser and generator for Ruby—Rust and SIMD via the first-party nosj crate, precompiled PGO platform gems, lazy documents and partial parsing, and a one-line JSON drop-in.
- [Audition](/opensource/audition.md) — Auditions Ruby scripts, gems, Rack apps, and Rails applications for Ractor-readiness—static analysis of isolation violations plus dynamic in-Ractor probing, with explanations and fixes.
- [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.