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

Testcontainers makes it easy to create and clean up container-based dependencies for automated tests.

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

Rescue from MySQL and Sqlite duplicate errors

Add relational OLAP-like functionality for ActiveRecord

Extension for ActiveRecord that adds support for PostgreSQL array columns, mapping string values to integers.

Redshift-oriented Data Warehouse Batch Framework

A gem to help with hooking Contentful into your Rails application

integrated library system

https://github.com/tsukasaoishi/fresh_connection

Another business actions architecture for Rails apps

The new de-facto for API testing your Rails application

Adds recurring jobs for Sidekiq

Open-source gems maintenance & maturity tracking

Petri Net Workflow Engine for Ruby.

postgresql hstore parser/deparser - provides PgHstore.dump and PgHstore.load (aka parse)

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

RailsDbInfo is a Rails engine that quickly shows the database info

A Fresh new GraphQL server for Rails applications, with a focus on natural and Ruby-like DSL

Common libraries for RedmineUP plugins (www.redmineup.com) for Redmine. Required Redmine from http://redmine.org