LiteCMS - Content Management Systems made simple
LiteCMS differs from off the shelf systems such as Drupal, Joomla and WordPress...
It is "managed CMS". The code base and implementation onto client sites is managed for you, so you can get one with selling your products. If a feature is not quite right for you or your client it can be customised. There is already a large number of "modules" available covering many aspects of content management.
The system has been built with search engine optimisation in mind, with facilities for SEO-friendly URLs etc. RSS feeds and commenting is built in to keep your customers involved in the website.