Kotlin is an open-source project developed by JetBrains, creators of IntelliJ IDEA and ReSharper, with the help of the community. The main goal behind this project is to create a language that would be a good tool for developers, i.e. will be safe, concise, flexible, 100% Java-compatible and well-supported by IDE and other tooling.
At the Cape Town Kotlin meetup we'll explore using Kotlin for a better mobile, stand alone app and server development experience.
Anyone interested in the Kotlin language: http://kotlinlang.org/ This is most suited to Java developers who want more expressiveness in their language, but still wish to use all of their tooling and frameworks.