Today, JetBrains announced a new release of their popular IDE IntelliJ IDEA. The company promised the new release brings a new set of features and tools, UI improvements, and improved coding assistance.
In addition, JetBrains' new in-development JVM language, Kotlin, has gone into Beta. Naturally, the new language is supported in IntelliJ IDEA 15.
You can find a list of all the improvements, along with .gif demonstratiosn of these features at the JetBrains blog.