LIBUSB is a Ruby binding that gives Ruby programmers access to arbitrary USB devices

Open OnDemand core library that provides support for an HPC Center to globally define HPC services that web applications can then take advantage of.

A Game Boy emulator written in Ruby

Ruby wrapper for OS X's keychain

FFI Ruby library for RS-232 serial port communication

Ruby wrapper for libwebp

Ruby bindings for ZBar, a barcode recognition library. Uses FFI to interact with the underlying C library, but has no other dependencies.

Bitcoin toolkit for Ruby

Celluloid bindings to the ffi-rzmq library

Ruby FFI bindings for libclang C interface.

Ruby FFI bindings for the Hunspell spell checker.

Useful Ruby FFI bindings for libc.

A CLI with helpful QA tools for iOS and Android from the command line

GirFFI creates bindings for GObject-based libraries at runtime based on introspection data provided by the GObject Introspection Repository (GIR) system. Bindings are created at runtime and use FFI to interface with the C libraries. In cases where the GIR does not provide enough or correct information to create sane bindings, overrides may be created.

Hallon allows you to write Ruby applications utilizing the official Spotify C API.

Beat Heroku's 60s boot timeout with a forward proxy.

LevelDB for Ruby

High performance gradient boosting for Ruby

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Enables you to publish your podcast using the Jekyll static site generator, creating feeds and a reasonably looking website