Genea.app - Genealogy tool designed with privacy in mind that anyone can use to author or edit their family tree. Data is stored in the GEDCOM format and all processing is done in the browser. (Source Code) MITJavascript
GeneWeb - Genealogy software that can be used offline or as a Web service. (Demo, Source Code) GPL-2.0OCaml
Gramps Web - Web app for collaborative genealogy, based on and interoperable with Gramps, the open source genealogy desktop application. (Demo, Source Code) AGPL-3.0Docker
webtrees - Webtrees is the web's leading online collaborative genealogy application. (Demo, Source Code) GPL-3.0PHP