Gaudenz Alder has released version 3.4 of JGraph, an open source graph component for Swing that requires Java 1.4 or later. JGraph is accompanied by Graphpad, an open-source diagram editor for Swing that offers Automatic Layout, Printing, Zoom, and much more. It is available in English, German and French. According to Alder, "This release can handle overlapping edges, and has static inner handles for better subclassing. Among other minor API changes some control methods were moved to the handles." Of course, various bugs have been fixed as well.
Dan Creswell has released Blitz JavaSpaces 2.0.5, an open source implementation of JavaSpaces that is Jini 2.0 enabled. It implements smart indexing, tuneable persistence, and active/passive lease cleanup.