phpGedView is a family tree editing and presentation software application for web browsers. It is a Free Libre Open Source Software project licensed under the terms of the GNU General Public License and developed at the sourceforge.net organization.
Here is the description from phpGedView's homepage at http://www.phpgedview.net (as of 2005-11-26):
PhpGedView is a revolutionary genealogy program which allows you to view and edit your genealogy on your website. PhpGedView has full editing capabilities, full privacy functions, can import from GEDCOM files, and supports multimedia like photos and document images. PhpGedView also simplifies the process of collaborating with others working on your family tree. Your latest genealogy information is always on your website and available for others to see.
See also Software for Web Browsers