redis_failover is a ZooKeeper-based automatic master/slave failover solution for Ruby

Regexp#examples returns a list of "all" strings that are matched by the regex. Regexp#random_example returns one, random string that matches.

SQL databases support for ROM

A simple library to parse and generate HL7 2.x messages

ruby-prof printer that exports to fold stacks compatible with FlameGraph

scanf is an implementation of the C function scanf(3).

Scoped search makes it easy to search your ActiveRecord-based models. It will create a named scope :search_for that can be called with a query string. It will build an SQL query using the provided query string and a definition that specifies on what fields to search. Because the functionality is built on named_scope, the result of the search_for call can be used like any other named_scope, so it can be chained with another scope or combined with will_paginate. Because it uses standard SQL, it does not require any setup, indexers or daemons. This makes scoped_search suitable to quickly add basic search functionality to your application with little hassle. On the other hand, it may not be the best choice if it is going to be used on very large datasets or by a large user base.

This plugin provides native memory instrumentation for monitoring and metrics collection, including: memory usage via `free` and `vmstat`, including metrics. Note that this plugin may have cross-platform issues.

This plugin provides native process instrumentation for monitoring and metrics collection, including: process status, uptime, thread count, and others

A simple sentiment analysis gem

Sequent is a CQRS and event sourcing framework for Ruby.

Define dependency graphs of Sidekiq jobs

Add reflection on ActiveModel dynamic attributes that will be created at runtime

SSRF Proxy is a multi-threaded HTTP proxy server designed to tunnel client HTTP traffic through HTTP servers vulnerable to HTTP Server-Side Request Forgery (SSRF).

Distributed locks (mutexes & semaphores) using Memcached or Redis.

This gem provides a graphical frontend for the Taskwarrior task manager. It is based on Sinatra.

Create temporary table-backed ActiveRecord models for use in tests

ThumbsUp provides dead-simple voting capabilities to ActiveRecord models with karma calculation, a la stackoverflow.com.

This gem identifies valid tracking numbers and the service they're associated with. It can also tell you a little bit about the package purely from the number—there's quite a bit of info tucked away into those numbers, it turns out.

Websocket interface on Rack Hijack w/ Rails support