Gottfried Wilhelm Leibniz was a major contributor to mathematics, physics, philosophy, theology, logic, and early computer science; independent inventor of calculus in mathematics; inventor of energy and the action principle in physics; jurist, genealogist, diplomat, librarian; worked towards reunification of Catholic and Protestant faiths. This in-progress article will list all his published and unpublished works primarily based on the Leibniz Library in Hannover, and its online catalog.