The Ruby Language Toolkit provides classes for creating context-free grammars, lexers, parsers, and abstract syntax trees.

Ruby wrapper around MQ series client library

Support rnp's OpenPGP functionality via ruby-ffi. Requires librnp.so.

A Ruby FFI binding to librocketmq-client-cpp.

A gem to wrap OpenGL and extensions in an intuitive OO framework.

Very fast jsmin implementation using FFI

ROpenCV is a ffi ruby binding for the Open Source Computer Vision Library OpenCV 2.4.4 and higher

Ruby bindings for rpm. Almost a drop-in replacement for ruby-rpm. Uses FFI.

ps for Ruby processes

Allows to script access to the serial port on Windows. Simple read and write commands

The rslp library is an FFI interface for the OpenSLP service location protocol library. See http://www.openslp.org for more information.

Command-line tool for generating boilerplate for testing Ruby scripts

FFI Ruby wrapper around libsvm

A hack to get source/destination port/ip from a TCP or UDP header

Ruby bindings for librtlsdr - turn RTL2832 based DVB dongles into SDR receivers

libudev bindings

Ruby library for working with Digilent devices via the Adept SDK. Provides both low-level wrappers for the Adept SDK elements and high-level interfaces, including simple programming and configuration routines.

Play and record sound via ALSA library

Access help to the Ruby C library from FFI

Client for accessing the BEARS blockchain.