What is JetBrains?

Answer 1

JetBrains is a software development company whose tools are targeted towards software developers and project managers
The company offers an extended family of integrated development environments (IDEs) for SQL and the programming languages Java, Kotlin, Ruby, Python, PHP, Objective-C, C++, C#, Goand JavaScript.
https://www.jetbrains.com

Answer 2

And is it possible to use cold fusion for creating websites?

Answer 3

JetBrains - one of the most popular and respectful company, which specialise in IDE-developing. Also JetBrains create its own language "Kotlin" for Android-developers.

Answer 4

Never knew Kotlin was developed in St Petersburg, Russia by Jetbrains.

Answer 5

A software company

Answer 6

It’s company, which creare compilers/interpreters for different languages.