RuboCop has many breaking changes between releases. This tool migrates your RuboCop config, making updating RuboCop easier.

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.

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

Helps to save your eyes, when reading hardcore SQL requests in console

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

Adds the ability to pull random records from ActiveRecord

Refrigerator freezes all core classes. It is designed to be used in production, to make sure that none of the core classes are modified at runtime. It can also be used to check libraries to make sure that they don't make unexpected modifications/monkey patches to core classes.

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.

Sass compiler and Sinatra routing for SassMeister.com

MySQL adapter for thoughtbot/scenic

SmartTodo is a tool designed to assign specific users on todo's task written in your codebase and help assignees be reminded when it's time to commit to their todo's.