Blog for Verdantium, JUndo, and Meta. Verdantium is an OpenDoc-like compound-document framework, and an open-source alternative to frameworks underlying OpenOffice, StarOffice, Corel Office, and Microsoft Office. Verdantium is written in a combination of JUndo, Java JFC/Swing, and Java-2D. JUndo is a declarative object-oriented programming language with functional, and intensional programming characteristics. Applications include multi-level undo and sophisticated error recovery.