Greentable automatically produces HTML tables from an array in a succinct way. It also provides an easy way to export and print a particular table

Notify, retreive systems, and misc information from the webservice.

Dispense expensive objects with ease

Gurk

A DSL for quickly creating endpoints for GitHub post-receive webhooks.

A simple blog engine based on Sinatra and document_mapper

JSON HAL APIs on Rails in the style of PRX. Uses ROAR

Eases web-request routing, handling, and response as a half-way front, half-way page controller. Implemented with specific emphasis on enabling easy unit/integration testing that doesn't require a browser.

RSpec and Cucumber helpers for HAL

haml_interceptor is a Rack middleware designed to intercept JS responses from a web application and re-process them from HTML to Haml, resulting in a smaller package sent down the wire to the client.

Simple HTTP server which allows transpiling HAML files through HTTP request using Ruby implementation

Simple faraday client preconfigured

A collection of resource-focused controllers for the Happy Web Application Toolkit.

Health checker for ruby apps. Can be mounted or booted as standalone app

Seamlessly integrate headlessapp.com into your Rails application

Make the Domain the center of your programming world

Hecks HTTP Resource Server

CI-Joe alike CI system called Heidi.

Heisenberg is an REST API integration testing tool for rack based REST APIs

The example gem created for a lightning talk on sinatra tools at Rubyconf 2009