Sun is offering for free full-license versions of Sun's award winning integrated development environments (IDEs) - Sun Java Studio Creator 2004Q2 (full license) and Sun Java Studio Enterprise 8 (full license).

I have used Sun Java Studio Creator and I liked it very much. Both of them are highly recommended.

Get your free copies here.
Note: If you do not have SDN (Sun Developer Network) membership then you will have to create one (for free).