I work for a hosting provider so that is a good question imo. What you are looking for is a flat file storage CMS to avoid a database. Requiring user management and simplicity you will not want to code this from scratch. We deal with alot of CMS (Content Management Systems) and most are bloated and require MySQL.
Check Out: http://get-simple.info/
I fired an installation up and it is very easy to install, has alot of features, and is very WordPress like which means it looks good out of the box and is very easy to use.
I hope this helps you out and if you do use it let me know your thoughts.