Power Enum allows you to treat instances of your ActiveRecord models as though they were an enumeration of values. It allows you to cleanly solve many of the problems that the traditional Rails alternatives handle poorly if at all. It is particularly suitable for scenarios where your Rails application is not the only user of the database, such as when it's used for analytics or reporting.

Build complex SQL queries by defining each subquery separately. Query::Composer will then compose those subqueries together, nesting as needed, to produce the final SQL query.

Failover for ActiveRecord and Redis

Support && Add syntax sugar to #or query method in Rails 3, 4, 5.

A true Bayesian rating system with scope and cache enabled.

RecordWithOperator is a rails plugin that makes your all active record models to be saved or logically deleted with created_by, updated_by, deleted_by automatically. Also it makes creator, updater, deleter association (belongs_to) if the class has created_by, updated_by, deleted_by.

Provides a module insertion protocol to facilitate adding features to ActiveRecord

Adds support in ActiveRecord for PostgreSQL index expressions and operator classes, as well as a shorthand for case-insensitive indexes

A Rails gem to automate and customize database seeding for ActiveRecord models, using Faker and configurable YAML files.

Setler is a Gem that lets one easily implement the "Feature Flags" pattern, or add settings to individual models. This is a cleanroom implementation of what the 'rails-settings' gem does. It's been forked all over the place, and my favorite version of it doesn't have any tests and doesn't work with settings associated with models.

Super simple slugs for ActiveRecord 3.0 and higher, with support for slug history

Stateful workflow modeling for Rails

This gem provides asynchronous indexing to Solr for the sunspot gem. It uses a pluggable model for the backing queue and provides support for ActiveRecord, DataMapper, and MongoDB out of the box.

Tenacity provides a database client independent way of specifying simple relationships between models backed by different databases.

Manage delta indexes via Resque for Thinking Sphinx

types_from_serializers helps you by automatically generating TypeScript interfaces for your JSON serializers, allowing you typecheck your frontend code to ship fast and with confidence.

ULID for Rails

Skip default_scope in your associations

Adds methods for getting a zodiac sign from any Date/Time object containing a date of birth, and can also extend ActiveRecord::Base adding some handy instance and class methods (for searching by a given zodiac sign and more).

A framework that allows to write a domain server, that processes commands and creates events. You should have exactly one domain server for your Rails Disco applications. The domain runs in a domain specific database environment. This helps to make sure no other process interferes with the domain. Have a look at the rails-disco documentation on Github for more details.