With ffi-inliner you can run C code within your ruby script.

ffi-opengl is an autogenerated[1] ruby FFI interface towards OpenGL libraries (GL, GLU, GLUT). The FFI layer ensures compatibility among all Ruby implementation that support it. At the moment, this means that you can run the same ffi-opengl script with MRI Ruby and JRuby. ffi-opengl API aims to be a 1:1 tranposition of the OpenGL C API: don't expect idiomatic ruby inside!

A management tool for resque workers. Allows spinning up and managing resque workers across multiple machines sharing the same Redis server

ruby method describer to make it possible to inspect methods [rdoc, signature, etc.] at runtime, for example while debugging or in irb.

RightAgent provides a foundation for running an agent on a server to interface in a secure fashion with other agents in the RightScale system using RightNet, which operates in either HTTP or AMQP mode. When using HTTP, RightAgent makes requests to RightApi servers and receives requests using long-polling or WebSockets via the RightNet router. To respond to requests it posts to the HTTP router. When using AMQP, RightAgent uses RabbitMQ as the message bus and the RightNet router as the routing node to make requests; to receives requests routed to it by the RightNet router, it establishes a queue on startup. The packets are structured to invoke services in the agent represented by actors and methods. The RightAgent may respond to these requests with a result packet that the router then routes to the originator.

RocksDB for ruby using FFI

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

Ruby wrapper for RtMidi, a cross-platform C++ library for realtime MIDI input and output.

Run Perl code from any Ruby application, or run Perl web apps on Ruby.

The rubyzip-bzip2 gem provides an extension of the rubyzip gem for reading zip files compressed with bzip2 compression

Ruby to Rust transpiler for simple performance-oriented methods.

Ruby bindings for libfuzzy, a fuzzy hashing implementation included with the ssdeep utility

An automated web acceptance test framework for non-technical resources using selenium-wedriver.

Ruby implementation of the parity SCALE data format

an EDL scene-skipper/bleeper that works with DVD's and files and online players like netflix instant

Uses libssh via FFI to create an SFTP server. Useful for testing interactions with a remote SFTP server.

Ruby FFI interface to libskypekit C library

Interface with ISO 7816 smart cards.

A library for performing cryptography based on modern ciphers and protocols

Ruby bindings for subversion (SVN) based on FFI