This advanced CMS with in-context editing and ecommerce facility comes as FREE Open Source package.
Onxshop is licensed under the New BSD Licence (Open Source Initiative approved license). Enterprise licence available on request.
Onxshop is currently used by hundred businesses around the world, and that figure is growing all the time.
The initial development started in 2002 and version 1.0 was released in 2007. The latest stable branch is 1.7 released in 2014.