Non-Windows OS from Microsoft

"Want to see what a non-Windows-based operating system developed by Microsoft looks like?

"If you are willing and able to sign a non-commercial, academic Shared Source license, look no further. Microsoft on March 4 made the few-hundred-thousand lines of source code for Singularity Version 1 available for download from its CodePlex site. Microsoft made the announcement at its Microsoft Research TechFest 2008 event in Redmond, Wash.

"Singularity is an operating system and set of related tools and libraries that is developed completely in managed code. Singularity is not based on Windows; it was written from scratch as a proof-of-concept."

Find out more here.