Sun has decided to give away its famous IDEs for free with full-license. The IDEs include Java Studio Creator and Java Studio Enterprise. All you need to do to download them is to be a member of Sun Developer’s Network, which is also free to register. Sun Java Studio Creator 2 is soon to be out. It might be the one of the reasons.
But Sun isn’t the first to give free downloads. Microsoft also gives its Visual Studio Express Editions, which are free to use for 1 year.