Mackarel allows you to write acceptance tests in Rails in a readable way without having to deal with things like Cucumber.

Zero-configuration command-line HTTP server.

Magis Framework Gem

Receives checkins from the magistrate gem and sends back commands

A simple queue API with a maildir backend. Also includes an HTTP API

Integration with Mailgun Webhooks

This gem contains Maini libs utils

Framework built from scratch

Ruby library to generate sitemap for DataCite Commons.

Ramaze is a simple and modular web framework

Convenience method to provide controller actions that correspond to the HTTP verbs.

Nesta is a lightweight Content Management System, written in Ruby using the Sinatra web framework. Nesta has the simplicity of a static site generator, but (being a fully fledged Rack application) allows you to serve dynamic content on demand. Content is stored on disk in plain text files (there is no database). Edit your content in a text editor and keep it under version control (most people use git, but any version control system will do fine). Implementing your site's design is easy, but Nesta also has a small selection of themes to choose from.

Mascot rack app for stand-alone of embedded usage.

A library to enable per user / group authentication on a read / write basis for git repositories running over ssh

Autoscale your Heroku dynos

Speedyrails fork of jimson JSON-RPC 2.0 client and server

Rack Application for markdown memo

Unofficial wrapper for the MercadoBitcoin exchange API

A Code Reading Helper.

So meta