JetBrains have been supporting the conference since its first year and this year are back with a booth. If you're a developer you probably already know them, but they're always working on new stuff.
I'll let them say more in their own words:
JetBrains creates intelligent software development tools used by over 15 million professionals and 90 Fortune Global Top100 companies. Its lineup of more than 30 products includes IDEs for most programming languages and technologies, such as IntelliJ IDEA, PyCharm, CLion, and others, as well as products for team collaboration, like JetBrains Space. JetBrains is also known for creating the Kotlin programming language, recognized by Google as the preferred language for Android development.