H2O - the optimized HTTP/1, HTTP/2, HTTP/3 server

Disque is a distributed message broker

GameStream client for Android

Experimental, scalable, high performance HTTP server

Lightweight Ruby

The safe Markdown parser, reloaded.

Optimized JSON

Specification for Eddystone, an open beacon format from Google

The Rubinius Language Platform

High-performance time-series aggregation for PostgreSQL

ruby bindings to libgit2

🏂 EJDB2 — Embeddable JSON Database engine C library. Simple XPath like query language (JQL).

ngx_mruby - A Fast and Memory-Efficient Web Server Extension Mechanism Using Scripting Language mruby for nginx

Cross-platform asynchronous I/O primitives for scalable network clients and servers.

The Official MongoDB driver for C language

An interface to the ImageMagick and GraphicsMagick image processing libraries.

Simple evented I/O for Ruby.

A Ruby gem with native C extension for the scrypt password hashing algorithm.

Shortfin is a very fast and lightweight open-source web server that serves static content only.

Libxml bindings for Ruby.

Netplay-capable multi-machine emulator

Liquid performance extension in C.

Pebble Draw Commands example with a cards based app

A Libretro Frontend for Unreal Engine

C extension that wraps the GNU Barcode project using SWIG - Works on Ruby 1.9 (see ruby1.9 branch) - This is just a fork. See http://rubyforge.org/projects/gbarcode for upstream.