Ken Arnold has posted the first beta of Napkin Look & Feel, an open source (BSD license) Swing L&F that looks like it's drawn on a napkin.
Andrei Kouznetsov has released UnifiedIO 2.0, an open source (BSD license) class library that "allows random access to any data or stream (even over HTTP), and gives a clear difference between read only and read/write access." This is a refactoring release that is not backwards comp[atible with earlier releases.