EventMachine's built-in popen does not provide access to stderr. Likewise, it's DeferrableChildProcess does not use an errback for when the process fails. This gem fixes both of those mistakes.

An updated Erubis with block support. Block inheritance soon to come.

A ruby implementation of ESC/POS (thermal) printer command specification.

Ferry is a data migration and visualization command line tool rubygem that seeks to simplify the increasingly prevalent big data problems for developers

Tired of writing Ruby in Ruby? Now you can write assembly in Ruby!

FlexMock is a extremely simple mock object class compatible with the Minitest framework. Although the FlexMock's interface is simple, it is very flexible.

FortyFacets lets you easily build explorative search interfaces based on fields of your active_record models.

A basic API for reading and writing GPX files.

I18n date/number parsing/localization

Isolate is a very simple RubyGems sandbox. It provides a way to express and automatically install your project's Gem dependencies.

Add CDN support to jquery-rails

Build complex rules, serialize them as JSON, and execute them in ruby. See http://jsonlogic.com

Rails I18n library for ActiveRecord model/data translation using PostgreSQL's JSONB datatype. Translations are stored directly in the model table rather than shadow tables.

**** letsencrypt-plugin gem has been renamed to acme-plugin, please use acme-plugin instead**letsencrypt-plugin is a Ruby on Rails helper for Let's Encrypt service for retrieving SSL certificates (without using sudo, like original letsencrypt client does). It uses acme-client gem for communicatio...

Liquid performance extension in C

A very fast way to turn TeX math equations into beautifully rendered SVGs, to embed on the web. This library is mostly written in C and is a general purpose wrapper to GNOME's Lasem.

Ruby API for Mercurial DVCS.

natto provides a naturally Ruby-esque interface to MeCab. It runs on both CRuby (mri/yarv) and JRuby (jvm). It works with MeCab installations on Windows, Unix/Linux, and OS X. No compiler is necessary, as natto is not a C extension.

An ActiveRecord ODBC adapter

A graphical user interface for your PGBouncers