See http://www.openannotation.org/spec/core/

Audit support for Active Record

A View-Component framework for Rails applications.

Tools to compare ActiveRecord entries with Cucumber tables

ActiveHistory tracks and logs changes to your ActiveRecord models and relationships for auditing in the future.

Create collections of records, represented by ActiveRecord::Relation query criteria which can be serialized and passed around without executing queries or loading records.

ActiveRecord extension for cursor based pagination.

A safe way to accept user parameters and order against your ActiveRecord Models

Add a `to_hash` method that can acquire the relations to the active record.

Flexible but opinionated framework for defining and running reports on Rails models backed by SQL databases.

Easily filter, sort, and paginate enumerable sets.

Simple, efficient, and extensible webhooks for Ruby, including: Rate Limits, Cryptographic Signatures, Asynchronous Delivery, Buffered Delivery, Versioning.

acts_as_crazy makes your objects do crazy things at random moments

Description of ActsAsInterval.

ActsAsScrubbable helps you scrub your database the easy way with mock data at the ActiveRecord level

A rails engine that lets you mount a job search engine

Multiple tokens for Rails application.

Simple admin interface for Ruby on Rails applications.

Adminix

Simple ADP API client