From the site:
What is Frege?
Winner of the JavaOne Emerging Languages Bowl 2015, 2016, 2017
Frege is a Haskell for the JVM.
Like any Haskell, it is purely functional, enjoys a strong static type system with global type inference and non-strict - also known as lazy - evaluation.
Frege compiles to Java, runs on the JVM, and uses any Java library you want. It can be used inside any Java project.
