JetBrains MPS (build 6411) 1.5

JetBrains MPS (build 6411) is a brand new concept of software development environment implementing the Language Oriented Programming paradigm.MPS differentiates itself from many other language workbenches by avoiding the text form. Your programs are always represented by an AST. You edit the code as an AST, you save it as an AST you compile it as, well, as an AST.