Add a usage-based credit system to your Rails app, easily. Let users buy and spend credits on usage-based actions. Refill Stripe subscriptions with credits, sell one-time booster credit packs, implement PAYG (pay-as-you-go) billing, award free credits as bonuses, manage prepaid credits / tokens. ...

Wanko is a Rails Engine framework that can be used for rapid prototyping, feature toggle, or A/B testing

Use Watir (http://github.com/watir/watir) in Rails.

A Rails grid plugin to create grids with sorting, pagination, and filters generated automatically based on column types. The contents of the cell are up for the developer, just like one does when rendering a collection via a simple table. WiceGrid automates implementation of filters, ordering, pa...

Using the built in features of Rails, ActionAuth provides a simple way to authorize users to perform actions on your application.

Add rich text to your Ruby on Rails application thanks to Markdown.

Provides sortable_columns helper in active admin resource definitions.

Provides time line support and database migrations for Cassandra

ActiveFrontend is a refreshingly modern responsive web framework for beautiful and faster project development.

Provides a form helper to make it easy to make drag and drop file upload fields that work with Rails' Active Storage.

PostgreSQL Adapter for Active Storage

Add a `send_zip` method in your Rails controller to send a `.zip` file containing one (or many) ActiveStorage object(s)

ActsAsTextcaptcha provides spam protection for Rails models with text-based logic question captchas. Questions are fetched from Rob Tuley's textcaptcha.com They can be solved easily by humans but are tough for robots to crack.

An advertising manager mountable engine

Simple plugin to add CSV export feature to Administrate

Plugin for adding ckeditor support in Administrate

JSON field plugin for Administrate

Core engine for adva-cms2.

I am altria.

A straight-forward REST API for Amazon's Flexible Payments Services.