**** 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 communication with Let's Encrypt server.

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

Use LDAP permissions in PostgreSQL

Pippi is a utility for locating suboptimal Ruby class API usage.

Adds missing native PostgreSQL data types to ActiveRecord and convenient querying extensions for ActiveRecord and Arel

Prawn/QRCode simplifies the generation and rendering of QRCodes in Prawn PDF documents.

Simple gem to translate routes in Rails 3.x based on translate_routes

Adds the ability to pull random records from ActiveRecord

Open local or remote XLSX, XLS, ODS, CSV (comma separated), TSV (tab separated), other delimited, fixed-width files, and Google Docs. Returns an enumerator of Arrays or Hashes, depending on whether there are headers.

RequestLocals gives you per-request global storage in Rails

Tracks jobs performed, failed, and the duration of the last 100 jobs for each job type.

High-performance logger of Ruby method invocations

Implementation of basic 2D geometry algorithms in Ruby

maven support for ruby DSL pom files. MRI needs java/javac installed.

A pure Ruby implementation of a useful subset of Prolog.