Peatio Irix is implementing several crypto-exchange for Arke and Peatio.

Peatio gem contains microservices and command line tools

Simple async HTTP crawler based on em-synchrony

Ruby 1.9 PostRank API Wrapper

Proxy server

A Redis-backed pub or processing queue with a non-blocking bar counter

A small service for logging and retrieving timeseries metrics into a Redis server

A Ruby clone of the awesome Webdis Redis web API

Rack middleware for building multi-protocol streaming rack endpoints

Web-enabled radio that plays to my schedule.

Prepares hosts/networks/etc to become part of a stated Mercury environment

automatic master/slave failover solution for redic by using built-in redis sentinel

Cross server-process-fiber EventMachine + Redis based semaphore with many features

Handles your HTTP requests in background in non-blocking way using Resque worker

Rity is a lightweight Ruby webserver that runs inside an EventMachine loop and puts each request into a fiber.

Super Scale Caching Framework - Core

Helper middlewares for a Goliath (http://goliath.io/) app as used in Infochimps Planet of the APIs

sequel + em_mysql2 + fiber_pool, deal with slow sql.

fiber awared mysql2 either fiber awared pg, em-pg-sequel should be universal.

em-synchrony glue for sinatra.