
yEd Graph Editor
yEd is a powerful diagram editor that can be used to quickly create diagrams manually or import external data for analysis and auto-magically arrange even large data sets by just pressing a button.
gedcom4j is an open-source, free-to-use Java library (jar file) that can read, manipulate, and write genealogy data using the GEDCOM format in your own Java programs...including commercial, closed-source projects.
gedcom4 is an opensource, freetouse Java library for loading (parsing) and saving genealogy data in GEDCOM 5.5 and 5.5.1 format.
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portable library java genealogy gedcom