Jekyll is a simple, blog aware, static site generator.

A Ruby parser written in pure Ruby.

A library for working with Abstract Syntax Trees.

Signet is an OAuth 1.0 / OAuth 2.0 implementation.

A simple, Git-powered wiki with a sweet API and local frontend.

Provides a better error page for Rails and other Rack apps. Includes source code inspection, a live REPL and local/instance variable inspection for all stack frames.

Stop Saying 'You Forgot To…' in Code Review

A Ruby Library for dealing with money and currency conversion.

A static site generator. Provides dozens of templating languages (Haml, Sass, Compass, Slim, CoffeeScript, and more). Makes minification, compression, cache busting, Yaml data (and more) an easy part of your development cycle.

kramdown-parser-gfm provides a kramdown parser for the GFM dialect of Markdown

xlsx spreadsheet generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx helps you create beautiful Office Open XML Spreadsheet documents ( Excel, Google Spreadsheets, Numbers, LibreOffice) without having to understand the entire ECMA specification. Check out the README for some examples of how easy it is. Best of all, you can validate your xlsx file before serialization so you know for sure that anything generated is going to load on your client's machine.

Gettext is a GNU gettext-like program for Ruby. The catalog file(po-file) is same format with GNU gettext. So you can use GNU gettext tools for maintaining.

Map simple html back into markdown, e.g. if you want to import existing html data in your application.

test-unit (Test::Unit) is unit testing framework for Ruby, based on xUnit principles. These were originally designed by Kent Beck, creator of extreme programming software development methodology, for Smalltalk's SUnit. It allows writing tests, checking results and automated testing in Ruby.

ComfortableMexicanSofa is a powerful Rails 5.2+ CMS Engine

IDE tools for code completion, inline documentation, and static analysis

Bootstrap the GitHub Pages Jekyll environment locally.

Ruby-Locale is the pure ruby library which provides basic APIs for localization.

A multithreaded, Postgres-based ActiveJob backend for Ruby on Rails

Style checker/lint tool for markdown files