ToaruOS

ToaruOS is a built-from-scratch hobby operating system with a bootloader, kernel, drivers, C library and userspace. It includes a composited graphical user interface, a dynamic linker, a syntax-highlighting text editor and a network stack. Some of the features of ToaruOS include virtual machine integration for absolute mouse and automatic display sizing in VirtualBox and VMware Workstation, a Unix-like terminal interface including a feature-rich terminal emulator and several familiar utilities, and optional third-party ports including GCC, Binutils and Python.