Stubb is the second mate.

Tipi - the All-in-one Web Server for Ruby Apps

Utopia is a framework for building dynamic content-driven websites.

vmpooler provides configurable pools of instantly-available (running) virtual machines

A warden strategy for easy oauth integration with github

Tools to help you develop Zendesk Apps.

A web server that can be spawned in any directory

Aptible CLI

Makes middleware that ships with Rack bullet-proof for async responses.

Standalone rack app to manage files onbehalf of your app

A set of adapters providing easy access to the GDS GOV.UK APIs

Rack compatible HTTP router for Ruby

Tiny health check of Rack apps like Rails, Sinatra for use with uptime checking systems like Kubernetes, Docker or Uptimerobot

Rack middleware for choosing a version of an interface to render for given request

A simple Rack middleware for checking app health.

Polyphony-http: Polyphonic HTTP for Ruby

A client library for Qiita API v2 written in Ruby.

A client wrapper around a Rack app or HTTP

Rack middleware for creating HTTP endpoints for files stored in MongoDB's GridFS

Lean and simple host redirection via Rack middleware