SmarterCSV is a high-performance CSV reader and writer for Ruby focused on fastest end-to-end ingestion — not just parsing. It returns ready-to-use hashes with configurable header and value transformations, intelligent defaults, and automatic delimiter discovery. Built for real-world data pipelines, SmarterCSV supports chunked processing for large files, streaming via Enumerable APIs, and C acceleration to optimize the full ingestion path (parsing + hash construction + conversions). Designed to handle messy user-uploaded CSV while remaining easy to integrate with Rails, ActiveRecord imports, Sidekiq jobs, parallel processing, and S3-based workflows.

Cucumber Expressions - a simpler alternative to Regular Expressions

Pry Doc is a Pry REPL plugin. It provides extended documentation support for the REPL by means of improving the `show-doc` and `show-source` commands. With help of the plugin the commands are be able to display the source code and the docs of Ruby methods and classes implemented in C. documentation

Actionable code coverage - detects untested code blocks in recent changes

Library for parsing InnoDB data files in Ruby

Dentaku is a parser and evaluator for mathematical formulas

Beautiful graphs for one or multiple datasets. Can be used on websites or in documents.

TinyTDS - A modern, simple and fast FreeTDS library for Ruby using DB-Library. Developed for the ActiveRecord SQL Server adapter.

Transport interface to talk to different backends.

Official LaunchDarkly SDK for Ruby

Ruby core extentions and Hanami utilities

Ridgepole is a tool to manage DB schema. It defines DB schema using Rails DSL, and updates DB schema according to DSL.

Warbler is a gem to make a Java jar or war file out of any Ruby, Rails, or Rack application. Warbler provides a minimal, flexible, Ruby-like way to bundle up all of your application files for deployment to a Java environment.

Bridgetown is a next-generation, progressive site generator & fullstack framework, powered by Ruby

This Ruby gem calculates the score based on the vector of the Common Vulnerability Scoring System (https://www.first.org/cvss/specification-document) in version 4.0, 3.1, 3.0 and 2.

MongoDB plugin for Fluentd

A friendly MySQL-compatible library for Ruby, binding to libtrilogy

The EmailAddress Gem to work with and validate email addresses.

dotiw is a gem for Rails that overrides the default distance_of_time_in_words and provides a more accurate output. Do you crave accuracy down to the second? So do I. That's why I made this gem. - Ryan

This gem is a Logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/logstash-plugin install gemname. This gem is not a stand-alone program