dxOS is a WebOS that provides a full-fledged desktop operating system in a web environment. dxOS includes tools and services for the developer to simplify the creation of portable web applications in cross-platform compatible ECMAScript.
The Banana Kernel is an open-source pedagogical operating system intended to provide useful means for teaching basic OS concepts, with the possibility of interaction with external modules developed by the teacher or student.
The D/OS Project aims to create a complete working operating system written in the D programming language.
The Isis OS Project Is a Controlled Project to Develop An Advanced Modern Operating System!
This was a personal research project for me. I never made any later commits, so most of the code is on unreadable floppy disks. I might tinker with the idea of a toy operating system someday.
TriOS - The Object Oriented Operating System, is the next generation operating system. Fully based on object orientation, it brings unique features to programmers and end users. Basically everything in TriOS is an object, even files and programs! Enjoy!!