Free & Open-Source IntelliJ IDEA Ultimate Alternatives

Powerful IDE for Java, Kotlin, and JVM languages.

1. IntelliJ IDEA Community ↗ ★ PICKFOSS
   JetBrains IDE for Java — open-source edition.
   ●○○Easy · Covers most basics
2. VS Code ↗ FOSS
   Microsoft's free editor — extensions for every language.
   ●○○Easy · Windows, macOS and Linux