SiteX is a fantastic all-in-one content management system (CMS) for small to medium websites. It's very easy to use, and has Pages, Gallery, Links, Guestbook and Forum modules built in. Unnecessary modules are easily disabled from its admin interface. SiteX also comes with a number of great themes, all of which can be customised from the admin interface - no coding necessary!
More information:
http://sitex.bjsintay.com/SME information:
http://wiki.contribs.org/SiteX