A free and open-source content management system (CMS) based on PHP

A free and open source content-management system and framework written in PHP and using relational database management system as a storage.

A free and open-source content management system (CMS) for publishing web content, based on on PHP and JavaScript. It is built on a model–view–controller web application framework that can be used independently of the CMS.

A free and open source e-commerce and online store-management software program

A self hosted Web publishing platform on Rails

Rails eCommerce System, fork of Spree

A complete open source e-commerce solution for Ruby on Rails

Tracks is a GTD web application, built with Ruby on Rails