"Serendipity is a PHP-based content management system (CMS) for powering blogs and other sites, and has a feature set that should make any blogger happy. After several years in development, the Serendipity team hit the 1.0 mark on June 15. Let's see how the 1.0 release shakes out.
"Installation is a breeze, and shouldn't take more than a few minutes for most users. If you've ever installed WordPress, Drupal, or other weblog software, you shouldn't have any problems..."