PearOs
Open Source Operating System
...Our goal, make something like Linux but different. Our code design and how things work is original and we like to write fast and well working code. PearOs has a very strong base, but is not meant for writing code using C#'s standard calls and functions. Instead there are work arounds and certain things that must be followed due to how the compiler was written. The Compiler uses Microsoft's "IL Disassembler" tool and can parse CIL files and convert them to Assembly.