The Atomium theme is a Drupal 7 base theme.
The goal of this base theme is to rewrite most of the core themes functions of Drupal and use proper render arrays and templates instead. This will allow users to customize at will most of the elements in a custom sub-theme using preprocess/process functions or by providing a custom template.
The sub-theme Atomium Bartik is provided as starterkit.
The registry alter mechanism and inheritance is based on the excellent Bootstrap theme and has been modified, see #2563445.
Issue tracker and the development are on Github.
Please have a look at the readme file for more information.