It is generally unfair to label websites having voting facilities as 'digg clone' since we don't label every phpBB site as vBulletin or InvisionBB or [insert a proprietary forum] clone just because they provide the same functionality.
Ok, enough for the rambling. Shakk.Us was built around the famous open source package 'pligg' which provides user submission/voting functionality, but it is also possible to create a digg-a-like site using the famous open-source content management system (CMS) – drupal 4.7.
Vote up/down is a drupal 4.7 module that provides functionality and user interface resembles digg or pligg.
A demo site is available here in Swedish. Vote up and down is there without ability to un-vote. You can login with your existing drupal account.
