I've posted version 1.0d4 of QuickTime Amateur, an open source clone of Apple's QuickTime Player that is uncrippled and free as in speech and beer. Currently this has only been tested, designed, and run on the Mac, though a Windows port is on the TODO list.
Version d4 fixes assorted bugs, and enables or partially enables several other features; but overall Amateur is still rather rough. Saving, in particular, needs a lot of work. However if you just want to play your movies in full screen mode without paying $30, it's good enough to do that now. Various other Pro functionality such as printing, editing, and copying and pasting movies is also enabled. Amateur is published under the GPL.
Sun has posted the second beta of NetBeans 5.0, an Integrated Development Environment (IDE) for Java. Netbeans is available for Windows, Linux, Mac OS X, and Solaris. I took a quick look. Some of my objections to earlier versions seem to have been addressed in 5.0, though I haven't tried any real work with it yet. Final release is planned for January 2006. Java 1.4.2 or later is required.