Get a free download from http://otn.oracle.com/products/jdev
Some really cool Java development features including
Visual JSP/HTML editor
Drag and drop data binding
Struts page flow diagrams
New UML diagrams
Web services support with WS-I
Deployment to Oracle Application Server, BEA, JBoss, Tomcat
Built-in TopLink integration
and much more...
Lots of new database related features including:
Database modeler - generate DB tables and reverse engineer DB into diagrams
PL/SQL editor
PL/SQL Stored procedures debugger
PL/SQL stored procedure to Web Services Wizards
Database browser
SQL Explain plan
And more.