Garner is a cache layer for Ruby and Rack applications, supporting model and instance binding and hierarchical invalidation.

Provides support for using versioning gems such as PaperTrail with Globalize.

Referencing code in app/ from a database migration risks breaking the migration when your app code changes; this gem prevents that mistake

Fragment cache for graphql-ruby

Adds group and membership functionality to Rails models

Inkwell provides simple way to add social networking features like comments, reblogs, favorites, following/followers, communities, categories and timelines to your Ruby on Rails application.

A faster, lower-memory, fuller-featured querying API for ActiveRecord that returns results as unadorned, read-only objects.

Add support for master/slave database database clusters in ActiveRecord to improve performance.

Search object DSL

Provides enhancements to ActiveRecord to handle spatial datatypes in PostgreSQL and MySQL.

A gem that provides a client interface for getstream.io

ActiveRecord/Mongoid enums with i18n

Set transaction isolation level in the ActiveRecord in a database agnostic way. Works with MySQL, PostgreSQL and SQLite as long as you are using new adapters mysql2, pg or sqlite3. Supports all ANSI SQL isolation levels: :serializable, :repeatable_read, :read_committed, :read_uncommitted.

Retries database transaction on deadlock and transaction serialization errors. Supports MySQL, PostgreSQL and SQLite (as long as you are using new drivers mysql2, pg, sqlite3).

Translation Center is a multi lingual web engine for Rails 3 apps. It builds a translation center community with translators and admins from your system users.

uffizzi_core

Easing the form object pattern in Rails applications.

Import tabular data from spreadsheets or similar sources into data models

Amazon Redshift _makeshift_ adapter for ActiveRecord 4.

Allows the use of CockroachDB as a backend for ActiveRecord and Rails apps.