GWintree is a GEDCOM-based genealogy program. It provides facilities to record, view, edit, and merge genealogy data, and to produce genealogy charts, family trees, and reports in a range of formats, including HTML. Charts can show all relatives, ancestors only, or descendants only. HTML charts allow you to click on a person in your HTML report to see where they are on the chart. Automatic matching and merging of genealogy data between files is supported.