[adrianlmm]

I don't recoment Kotling becuase despite being Open Source it requires a proprietary closed source IDE to use it, they have plugin for Eclipse but it will be always a second class citizen and the free version (IDEA) cannot comapre to Eclipse. To me is just a trojan horse that is heavily marketed by Jetbrains, even for Android apps I'd recoment Dart with Flutter over it.

[vbezhenar]

Idea Community Edition is free and open source. It supports Kotlin with the same plugin. Whether it's comparable to Eclipse is debatable. I like Idea much more.

[adrianlmm]

Objectively, Eclipse is milles ahead and more complete than IDEA, it is a toy compared to Eclipse

[pirocks]

AFAIK intellij/idea is open source:

https://github.com/JetBrains/intellij-community

https://github.com/JetBrains/kotlin

[adrianlmm]

>and the free version (IDEA) cannot comapre to Eclipse.

I already adressed it in my original comment, is not good enougth.