Rails engine to implement a Ruby backend store implementation for Annotator, an open-source JavaScript library to easily add annotation functionality to any webpage.

Easy Rails API documentation.

ArchiveTree is a Ruby Gem that makes it easy for you to create beautiful chronological archive trees of your models. For instance, you can create a tree for your blog posts.

Dead simple asset uploader attachments for your active record models

Framework that uses aws-ses to send newsletters

BAJA

A mountable Rails engine to create a payment server that can handle the money in your Bitcoin ecosystem

A Rails engine for adding blogging to any Rails 4 application

Imagine you have an Account model which has many transactions. calculable_attrs gem allows you to define Account#balance as SUM(transactions.amount) directly in your Account model. And solves n+1 problem for you in an elegant way.

Stripe Payments Integration with Catarse crowdfunding platform.

Wepay integration with Catarse crowdfunding platform

Works like a simple tagging system, but instead of tags it has categories, and categories may have an ilimited level of subcategories.

Rails engine for automatically renewing SSL certificates.

Constructor – content management system

Provide reporting and analysis of your site CSP violations

Models used in the Duke Digital Repository

Provides a concern for monitoring changes to has_many and has_many_and_belongs_to associations using ActiveModel::Dirty.

Dynamically generate fields for Rails by using jQuery.

A simple eBook (ePub and Mobi) generator gem

FRBR models requierd for EnjuTrunk