Carrington is a WordPress CMS theme framework, created by Alex King. At the moment there are four different Carrington theme bases, available from their themes page.
Carrington Blog
An elegant framework for a WordPress blog.
Carrington Text
A simpler theme with focus on text content.
Carrington Mobile
Designed for mobile devices such as the iPhone and Blackberry.
Carrington JAM
Just add markup. Designed to be a bare-bones framework. Not for those looking for a finished blog design.
[...] – A Look into the World’s Most Popular Theme Frameworks goes over frameworks such as Sandbox, Carrington, Thematic, and [...]