the web’s leading online collaborative genealogy application

webtrees is open-source software, which means it’s constantly improved by a community of developers and costs $0 - yes, that means totally FREE! All you need to use it is a website with PHP and MySQL installed.

It works from standard GEDCOM files, and is therefore compatible with every major desktop application; and it aims to be efficient and effective by using the right combination of third-party tools, design techniques and open standards.