Rambulance provides a simple and safe way to dynamically generate error pages.

Build Rails apps in a more maintainable way

Rein adds bunch of methods to your ActiveRecord migrations so you can easily tame your database.

This plugin provides native network instrumentation for monitoring and metrics collection, including: hardware, TCP response, RBLs, whois, port status, and more

Define dependency graphs of Sidekiq jobs

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

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

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

Enables Vagrant to manage virtual machines on a Proxmox server.

Gem for managing multiple analytics services in your rails app.

APIFuzzer gem builds api for finding security issues through a fuzzer

Local git repository hosting with a sexy web interface and bonjour discovery. It's like your own little adhoc, network-aware github!

Ruby/JS GUI framework

High method and class churn has been shown to have increased bug and error rates. This gem helps you know what is changing a lot so you can do additional testing, code review, or refactoring to try to tame the volatile code.

Crummy is a simple and tasty way to add breadcrumbs to your Rails applications.

CSV Validator

Provides a fake SQS server that you can run locally to test against

Declarative API for specifying features, switchable in declaration, database and cookies.