Sun is offering its high-end Java IDEs, Sun Java Studio Creator and Java Studio Enterprise, at no cost. Java Studio Enterprise 8 is the commercial IDE, which is based on open-source Netbeans 4.1. Java Studio Enterprise is capable to generate UML diagrams from your source code and vice versa. It has also a built-in collaboration tool that allows better team-work. Java Studio Creator is the Sun's Visual Basic Studio. It allows you to develop J2EE-App using Java Server Faces as front end.