We are making our webbuilder system available here to download here under the GPL licence.
Click here to download the source files
This is a content management system that we have developed over a number of years. Contained within the download is a "bin" directory that contains all the files required to get the webbuilder working, a "webadmin" directory, which is an admin system for the webbuilder, and a wbBase sql file, which contains just the table structures required for the webbuilder to function.