Fluentd: Unified Logging Layer (project under CNCF)

Resque is a Redis-backed Ruby library for creating background jobs, placing them on multiple queues, and processing them later.

EventMachine: fast, simple event-processing library for Ruby programs

Stanford 公开课，Developing iOS 8 Apps with Swift 字幕翻译

Ruby Google Chart API

Google Play Android App store scraper

[Closed] Source code of https://codecampo.com

A personal statistics dashboard and API.

The new railscasts-china site.

A synchronous amqp client

A tool for keeping track of nodes in your infrastructure

examples from "Thoughtful Machine Learning"

List, find and create jobs on a Jenkins CI server

a set of wrappers around the Net::SSH suite of tools to enable consistent access to remote systems.

highcharts-bootstrap

Bunny is a popular synchronous Ruby client for RabbitMQ.