IntelliJ IDEA Community Edition is the open source version of IntelliJ
IDEA, a premier IDE (Integrated Development Environment) for Java,
Groovy and other programming languages such as Scala or Clojure.

The Community Edition includes:

    An intelligent code editor that has all the smarts for understanding
    Java, XML and Groovy code

    Refactorings, code inspections and intentions, super-fast navigation
    and search

    Testing frameworks integration: JUnit and TestNG

    Build tools support: Ant and Maven

    Popular version control systems integration: CVS, Subversion and Git

    Swing UI designer

Homepage:
https://www.jetbrains.com/idea/
