Everest is a base theme for Drupal.

Sub-theme can be easily generated by using the Drush command.
$ drush everest-subtheme

Currently it is in the development phase.

Create a Zen 7.x-5.x sub-theme - Manually

The base Zen theme is designed to be easily extended by its sub-themes. You should Not modify any of the CSS or PHP files in the zen/ folder; but instead you should create a sub-theme of zen which is located in a folder outside of the root zen/ folder.

Subscribe with RSS Subscribe to RSS - sub-theme