The Mozart Programming System is an open source implementation of the programming language Oz 3.
Oz is a multi-paradigm language that supports declarative programming, object-oriented programming, constraint programming, concurrency and distributed programming as part of a coherent whole.
The scala-fast-dynamic is a compiler plugin + a small runtime library for the Scala programming language (http://www.scala-lang.org) that re-implement the way structural types are translated into JVM bytecode, achieving higher performance.