Symmetry is a small operating system written in C++. It aims to be platform independent and very fast.
It currently has support just for the basic functions needed to run a computer - the GDT, IDT, and paging, as well as dynamic memory management and a simple virtual file system (VFS).
At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.