IntelliJ IDEA

Java integrated development environment

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Hunter's comment

JetBrains brings different development solutions. IntelliJ Idea offers smart codecpletion, deep-static analysis, intelligent refactorings, debugger and a test runner, and can also handle Kotlin, Groovy, Coffee and Actionscript. For an overview of the all features you can visit its website. IntelliJ Idea is available in two options, a licensed Ultimate with more functionality and a free open source Community.

The Ultimate option will have to be paid for business and home use, but if the software is used for education or non-commercial open source projects, the license is free.