Tom Ball's cool
Jackpot
project is available for
early access.
Tom has provided the javac team with a lot of valuable feedback on the Tree API and JSR 269.
Jackpot builds on top of javac through these API components and allows you to
write your own refactorings. It also makes it very easy for the NetBeans
team to provide a whole suite of new refactorings and other cool stuff.
I can't wait for NetBeans 6.0 to go beta...