http://www.silverstripe.com - Other Open Source CMS - growing and lots of features

Try it ...

http://www.silverstripe.com/ ; - is an PHP Framework open source CMS to visualise, share, and combine your data and discoveries.
Demo URL : http://demo.silverstripe.com/admin/
User Name : admin
Password : password

Drupal, Wordpress - Checklist must follow

Wordpress:

http://www.scribd.com/doc/56007752/WordPress-Site-Security-Checklist-22May2011


Drupal:
http://danreb.com/sites/default/files/users/media/DrupalChecklist.swf




Others - paid ones but great features:::

Voice of the web:
http://www.readspeaker.com/

http://www.magictoolbox.com/magiczoomplus/

Useful Project Management tools - Open Source

Free project scheduling and management.

http://www.ganttproject.biz/