RMagick is an interface between Ruby and ImageMagick.

Ruby/GLib2 provides base features for GLib2 based bindings and many useful utility features.

SiteDiff makes it easy to see differences between two versions of a website. It accepts a set of paths to compare two versions of the site together with potential normalization/sanitization rules. From the provided paths and configuration SiteDiff generates an HTML report of all the status of HTML comparison between the given paths together with a readable diff-like HTML for each specified path containing the differences between the two versions of the site. It is useful tool for QAing re-deployments, site upgrades, etc.

Ruby bindings for cairo

Apache Arrow is a common in-memory columnar data store. It's useful to share and process large data.

GR framework - the graphics library for visualisation - for Ruby

Native extension gem for secp256k1 ECDSA and Schnorr signatures. Wraps libsecp256k1 natively without any need for FFI.

Rroonga is an extension library to use Groonga's DB-API layer. Rroonga provides Rubyish readable and writable API not C like API. You can use Groonga's fast and highly functional features from Ruby with Rubyish form.

ruby-libnotify is a ruby binding for libnotify

Ruby bindings to control windows in EWMH and NetWM compatible X Window manager, which is created from source code of wmctrl command.

A small C module that wraps libxml2's xmlreader to parse a XML string into a ruby hash

Ruby/ZOOM provides a Ruby binding to the Z39.50 Object-Orientation Model (ZOOM), an abstract object-oriented programming interface to a subset of the services specified by the Z39.50 standard, also known as the international standard ISO 23950.

Credo detector

Ruby Interface to Dream Cheeky(TM) USB Devices

Ruby bindings for fontconfig library

Allows for capturing images easily

A ruby-gtk framework

HTSlib bindings for Ruby

mysql2-replication is an extension of [mysql2 gem](https://rubygems.org/gems/mysql2). It adds support for replication client feature based on `libmariadb.so` that is a MySQL/MariaDB client library provided by MariaDB.

Ruby bindings for libappindicator used by Ubuntu's Application Indicators, released under the LGPLv3 license.