Add social network capabilities to your projects.

Adds marketplace functionality to Solidus stores.

Spree extension for providing Tax Cloud services in USA.

stripe_invoice adds PDF views and automated emails to your Koudoku-based application

A Rails Engine to fill in a select box based on a country_select

Allow to track changes of records which done through ActiveAdmin

Converts ActiveAdmin into a simple CMS

ActiveAdmin CMS extension

Rails 3 Bayesian Ratings Gem

Add pagination info to the response headers, GitHub style.

Apress-Api

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

Perform background jobs and ask for the result in a simple way.

Client lib to use attache server

Client lib to use attache server

Framework that uses aws-ses to send newsletters

BAJA

Brightcontent core

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.