Pronto runs analysis quickly by checking only the relevant changes. Created to be used on pull requests, but suited for other scenarios as well. Perfect if you want to find out quickly if branch introduces changes that conform to your styleguide, are DRY, don't introduce security holes and more.

Command-line tool for guessing which spec files are relevant to a set of input file paths.

Feature flippers with redis.

Methods for processing ANSI escape codes in strings.

Powerful tool to avoid N+1 DB or HTTP queries

Allows marking ActiveRecord objects as discarded, and provides scopes for filtering.

WithEnv is an extremely small helper module for executing code with ENV variables. It exists because I got tired of re-writing or copying over a #with_env helper method for the 131st time.

Standards-compliant WebSocket server and client

Textile parser for Ruby.

A set of methods for working with strings such as align, truncate, wrap and many more.

TablePrint turns objects into nicely formatted columns for easy reading. Works great in rails console, works on pure ruby objects, autodetects columns, lets you traverse ActiveRecord associations. Simple, powerful.

A small library for doing (command) lines

Rake tasks to migrate data alongside schema changes.

This library provides an authorization framework with a declarative DSL With this library, you can write permission policies that are separate from business logic. This library is in production use at GitLab.com

A simple and straightforward settings solution that uses an ERB enabled YAML file and a singleton design pattern.

calabash-android drives tests for native and hybrid Android apps.

Headless Webkit driver for Capybara

node-semver rewritten in ruby, for comparison and inclusion of semantic versions and ranges

Tanuki Emoji provides Emoji character information and metadata with support for Noto Emoji resources as fallback

Cucumber Expressions - a simpler alternative to Regular Expressions