Active Merchant is a simple payment abstraction library used in and sponsored by Shopify. It is written by Tobias Luetke, Cody Fauser, and contributors. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent interface across all supported gateways.

A fast, safe and extensible Markdown to (X)HTML parser

FastImage finds the size or type of an image given its uri by fetching as little as needed.

A Rack app that provides request/response rewriting proxy capabilities with streaming.

Amazon S3 output plugin for Fluentd event collector

Render components in views or controller actions. Server-side rendering powered by ExecJS. Transform JSX in the asset pipeline or use Shakapacker.

ActiveModel/Record integrations for Elasticsearch.

Wicked PDF uses the shell utility wkhtmltopdf to serve a PDF file to a user from HTML. In other words, rather than dealing with a PDF generation DSL of some sort, you simply write an HTML view as you would normally, and let Wicked take care of the hard stuff.

Ruby on Rails integrations for Elasticsearch.

When a Cucumber step fails, it is useful to create a screenshot image and HTML file of the current page

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.

Get memory usage of a process in Ruby

Rack middleware which aborts requests that have been running for longer than a specified timeout.

All the stuff that isn't good/big enough for a real library.

Provide Ruby core source files for C extensions that need them.

Elasticsearch output plugin for Fluent event collector

**Logging** is a flexible logging library for use in Ruby programs based on the design of Java's log4j library. It features a hierarchical logging system, custom level names, multiple output destinations per log event, custom formatting, and more.

As of version 0.6.0, only Microsoft Excel compatible spreadsheets are supported

Filter plugin for modifying event record

This library uses ANSI escape sequences to control the attributes of terminal output