Software+

I am a fan of Open Source software.

This site is built on Drupal Http://Drupal.org

Wordpress is  a powerhouse of add on modules that make it unbeatable. Especialy if you need a small site now. You can be up and running is a few hours or less http://wordpress.com

You can find a raft of other 5 Star open Source programs here http://www.uberdownloads.com/