Singularity Now Available On CodePlex
Singularity is an operating system research project that is being developed by Microsoft Research. They have recently released the Singularity Research Development Kit on CodePlex and it looks quite interesting.
Singularity is mostly written in managed code (C#) with only a small amount of unsafe C/C++ code in the kernel and bootstrapper. It also implements some interesting security measures for partitioning the various components of the OS.
This is something that I will be diving into fairly soon, so there will surely be some future posts about Singularity.