Instant Site Launch / Content Management / Blog Software
WordPress
This is the software that we use to run this site. It is the quickest and easiest way to launch a web site that is Web 2.0-ready. It’s free.
I really don’t understand why more people don’t use it – It is free and part of the community of free software that is available for anyone to use and alter as they see fit – you don’t get that from others.