Web Directory by Internet-Web-Directory.com

Connects many open source projects together in one neat package; kernel, boot loader, graphical user interface, console user interface, applications, programming languages, drivers, file system support for BeOS, Linux, Windows 95/98/NT. [Open Source, GNU]

Assembly language OS for Intel/AMD x86 architecture made specifically for serving the Web, written originally for the programmer's personal interest and education after moving to the PC platform from his old 8-bit machine. Philosophically similar to V2 OS.

Was FreeMWare. Extensible PC virtualization program to allow running multiple OSs at once on one processor. Runs as much OS and application software natively as possible, the rest emulated by PC virtualization monitor. [Open Source, LGPL]

Multi-process/threaded protected mode OS for all i386+ systems, written in all 16-/32-bit Assembly in TASM, fully PROMable so can port to embedded systems with no keyboard and/or screen, stable and secure via segment protection and paging. [Open Source, GPL]

Rewriting Windows: new OS now being designed for computers with Intel (or compatible) i386, i.e., with multitasking functions built into the processor. Will be Windows compatible, but won't be a Windows clone: will give Windows executables the needed API so they can run correctly. English/Italiano.

Runs on i386+ compatible, working GUI even on 4 MB. Coded in Assembly, C. Brief description, download link. [Open Source, GPL]

Open-source, full featured graphical (GUI) 32-bit operating system for x86 386+ architecture; network and Sound Blaster support, mice, video, and many file systems. Website shows requirements, screenshots, status, downloads, documentation, contacts, members, forum, mail list.

OS for IA32 processors (i486 and up, and compatible), 32-bit graphical monolithic kernel, modular device drivers and GUI. Supports GCC (Cygwin), Visual C++, Unicode throughout; plans for many GNU tools are underway. [Open Source]

A few screenshots, details, links.

VISual OPerating SYStem: small, fast, home-brewed, open source, 32-bit, true preemptive multitasking OS kernel for x86, runs in 32-bit mode, virtual memory. Also links, and free code bits for developers, on various pages. [Open Source, GPL]