Can you embed a binary in a Gem? Can you distribute it to multiple architectures?

Calculate the entropy of data

Ruby bindings for the envelopers envelope encryption library

Ruby library for Enzoic API

Tools to calculate Eddystone ephemeral identifiers

A Ruby binding for epoll(7)

Ruby Extension that allows for reads and writes to the /etc user db.

Ethash is Ethereum's mining algorithm.

EventMachine implements a fast, single-threaded engine for arbitrary network communications. It's extremely easy to use in Ruby. EventMachine wraps all interactions with IP sockets, allowing programs to concentrate on the implementation of network protocols. It can be used to create both network ...

Trace your Ruby function's execution path

Exerb support for mingw/rubyinstaller. Packaged ruby source files and ruby extensions files into a single PE executable file.

Ruby EXIF geo tagger based on libexif.

Helps manage ruby application specific environment variables for multiple apps in development.

extension tut

Watch directories using platform specific notifier.

This is a ruby interface for interacting with ezmlm-idx, an email list manager for use with the Qmail MTA, and the messages contained therein. (The -idx provides an extended feature set over the original ezmlm environment.)

Factorials as C extension.

Active Support impelementation in C for the ones who need for speed.

A naive bayes text classification algorithm built in C++, with a Ruby interface using Rice

Fast Bit String to Ruby Arrays of IDs, using C for magical speediness. Perfect for use with Redis Bit sets