Major features

Toolchain primarily exposed as a library

Most compilers and toolchains are exposed as a set of command line programs (make, cc, link, etc.). Mu's toolchain is exposed primarily as a code library in addition to command line programs. This cures a lot of string manipulation and platform variance in the build process.

Partially ordered instructions

Most programming languages have you define a sequence of instructions or a total order; this limits the amount of optimization compilers can perform. Mu syntax is a partial order allowing maximum concurrency all the way from the instruction to the thread level.