ActiveRecord Tableless Models provides a simple mixin for creating models that are not bound to the database. This approach is useful for taking advantage of the features of ActiveRecord such as validation, relationships, etc.

A recommendation engine for Rails.

Adding 'Website' field to the contact form.

CSV template handler for Rails. Enables :format => 'csv' in controllers, with templates of the form report.csv.csvbuilder.

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

Delayed Cron Job is an extension to Delayed::Job that allows you to set cron expressions for your jobs to run regularly.

Stores draft versions of your ActiveRecord models' data in a single table or split up into separate tables. Works with Ruby on Rails and Sinatra.

Copy active record models from remote databases

FortyFacets lets you easily build explorative search interfaces based on fields of your active_record models.

Functional Reactive Programming with EventSourcing in Ruby

This library provides view components for the GOV.UK Design System. It makes creating services more familiar for Ruby on Rails developers.

Hydra-Head is a Rails Engine containing the core code for a Hydra application. The full hydra stack includes: Blacklight, Fedora, Solr, active-fedora, solrizer, and om

The JitPreloader has the ability to send notifications when N+1 queries occur to help guage how problematic they are for your code base and a way to remove all of the commons explicitly or automatically

A MediaElement gem(engine) for Rails. Makes embedding HTML5 video easy.

Nested scaffold generator for Rails

An awesome nested set implementation for Active Record

To have all your data in one place: the database

Helps to save your eyes, when reading hardcore SQL requests in console

Admin interface builder

Implements field type and partial for "tag_list"(*_list) virtual attribute.