I believe you'll like this announcement — IntelliJ IDEA has just gone open-source! Check out the press release
as well as the new jetbrains.org community site for the details. We all will soon get a lot of new friends
and colleagues in our IntelliJ IDEA community!
Starting with the upcoming version 9.0, IntelliJ IDEA will be offered in two editions: Community Edition and Ultimate Edition. The
Community Edition focuses on Java SE technologies, Groovy and Scala development. It's free of charge and
open-sourced under the Apache 2.0 license. The Ultimate edition with full Java EE technology stack remains our
standard commercial offering. See the feature comparison matrix for the differences.
Briefly, in the free Community Edition you'll get all the Java code support — various refactorings and code
inspections, coding assistance; debugging, TestNG and JUnit testing; CVS, Subversion and Git support; Ant and Maven
build integration; and Groovy and Scala support (through a separate plugin). To learn more and download the Public
Preview of IntelliJ IDEA 9 Community Edition, please visit the IntelliJ IDEA Community Edition site.
The IntelliJ platform, the common foundation for all our IDEs (IDEA, RubyMine, WebIDE or MPS), is being open-sourced
under the APL 2.0, too.
You'll find all the relevant information on how to participate and benefit at the jetbrains.org site. Check out the FAQ if you have additional questions.