Rack GitHub Repositories (2026) · Open Source Tools

rack layout designer

Classy web-development dressed in a DSL (official / canonical repo)

File Attachment toolkit for Ruby applications

Manages application of security headers with many safe defaults

:chart_with_upwards_trend: The Rack Based A/B testing framework

Rum based microframework for web development.

Rack middleware for rate-limiting incoming HTTP requests.

Prometheus instrumentation library for Ruby applications

Complete, fast and testable actions for Rack and Hanami

Tell StatsD about request time, GC, objects and more. Latest Rails 4 and Ruby 2.1 support, and ancient Rails 2 and Ruby 1.8 support.

run Rack applications in-process, without a server

A Ruby/Rack web server built for parallelism

openapi_first is a Ruby gem for request / response validation and contract-testing against an OpenAPI API description. It makes APIFirst easy and reliable.