Hi guys! I have a client whom I am designing a site for. They want to be able to add and delete content easily, and isn't really a fan of Wordpress. Is there anything else that I may not know about, that will allow someone to do that?
You could try Drupal.org, it has a slightly higher learning curve than WordPress. Don't just download the basic core, look for a distribution that will closely meet your clients needs and use that as your starting point. This will give you a big head-start.
What you are looking for is CMS (content management system), here's a pretty decent list of CMS's http://webscripts.softpedia.com/cat/Content-Management-list-27-1-0-0.html.