Respond error for requests include some offensive string, that may crash browsers

E-Mail development, build and test system.

Minimalist API documentation generator for Rack applications.

api-fairy is a Rack Middleware that magically speeds up your slow backend services just by including it as your middleware.

A CLI for Apigee

Rack-like HTTP client library inspired by Faraday done my way

Ruby client for Appdash, Sourcegraph's application tracing system, based on Google's Dapper

AppIdentity is a Ruby implementation of the Kinetic Commerce application identity proof algorithm as described in its [spec][].

Rack middleware to output like access log.

Gem to help building App Rail servers using Airtable as a backend

Doing some more with Appsignal

Arcabouco WebApp Framework

Ruby Web Client that syncs with most models

A version of Wycat's Artifice for use with Excon.

Track Kanban metrics using Asana as a data source

Assert with Rack::Test

Assert-methods (sugar) and a tiny DSL to facilitate testing of rack apps with Rack::Test.

compiles and serves static assets

Renders all asset types (coffeescript/sass/scss) as equals

This is an alternative implementation of the observer pattern. As you may know, Ruby (and Rails/ActiveRecord) already have an implementation of it. This implementation is a variation of the pattern, so it is not supposed to supersede the existing implementations, but "complete" them for the specific use-cases addressed.