This plugin provides native PostgreSQL instrumentation for monitoring and metrics collection, including: service health, database connectivity, database locks, replication status, ...

It makes working with pure SQL easier with syntax highlighting. Let's you clean your Ruby code from SQL strings.

Add support to complex resources of PostgreSQL, like data types, array associations, and auxiliary statements (CTE)

Manage delta indexes via Delayed Job for Thinking Sphinx

Simple gem that allows you to run multiple ActiveRecord::Relation using hash. Perfect for APIs.

Rescue from MySQL and Sqlite duplicate errors

Add relational OLAP-like functionality for ActiveRecord

Redshift-oriented Data Warehouse Batch Framework

Bullet Train Incoming Webhooks

Allow users of your Rails application to subscribe and receive webhooks when activity takes place in your application.

Yaml-backed ApplicationHash for CanCan Roles

A gem to help with hooking Contentful into your Rails application

Strategies for cleaning databases using Sequel. Can be used to ensure a clean state for testing.

integrated library system

https://github.com/tsukasaoishi/fresh_connection

The new de-facto for API testing your Rails application

Open-source gems maintenance & maturity tracking

Petri Net Workflow Engine for Ruby.

Organize ActiveRecord model into a tree structure using PostgreSQL LTree

Load postgres databases into Amazon Redshift. It's designed to work on Heroku Scheduler, or other *nix/BSD hosts.