Apertos
   Object-oriented reflective OS, from Sony Computer Science Lab.
   http://www.csl.sony.co.jp/project/Apertos/

Athene
   Next generation, commercial, kernel independent, all object and component based computing environment and OS that users can design to their specifications. Backend is built to run in almost any environment.
   http://www.rocklyte.com/athene/

Atomatrix
   Multithreaded execution system of atomic matrices with dynamic compiler, a network environment, and an object-oriented OS. Open source, BSD.
   http://atomatrix.sourceforge.net/

Choices Object-Oriented Operating System
   Research OS coded in C++, architecture organized as frameworks of objects hierarchically classed by function, performance; customized by replacing subframeworks, objects; application interface is kernel objects exported via application/kernel protection l
   http://choices.cs.uiuc.edu/

Iguana Project
   Investigating use of object-orientation, computational reflection, and metaobject protocols (MOPs) to support dynamic customizing of (system) software.
   http://www.dsg.cs.tcd.ie/~coyote/

MK++
   Mach compatible microkernel; gives one code base able to support high assurance, scalability, realtime, distribution, SMP, fault handling, performance; all built in an object-oriented B3 evaluable fashion.
   http://www.opengroup.org/RI/technologies/mk-dbleplus/

Maruti
   Goal: create an environment for developing and deploying critical applications with hard real-time constraints in a reactive environment. Such applications must be able to execute on a platform of distributed and heterogeneous resources, and operate conti
   http://www.cs.umd.edu/projects/maruti/

Renaissance
   Multiprocessor OO OS purely designed and implemented in object-oriented techniques, to give application programs transparent access to system and remote objects distributed in a network of machines. OO programming is an ideal approach for building distrib
   http://www.cs.purdue.edu/AnnualReports/95/AR95Book-120.html

SOS: SOMIW Object-Oriented Operating System
   Most interesting research results: simple, generic, powerful object model; the concept of Fragmented Objects to structure distributed abstractions; developed flexible naming service, dynamic linking package, library of application oriented communication p
   http://www-sor.inria.fr/projects/sos/

ShagOS
   Portable object-oriented microkernel OS, dynamically loaded device drivers, fully redesigned and rewritten many times in C++, runs on VAX, x86. Ongoing experiment in using O-O paradigm as framework for full OS, with distributed computing as main aspect in
   http://www.csh.rit.edu/~shaggy/shagos.html

Tornado
   Object-oriented operating system for large-scale shared-memory multiprocessors. Minimizes data sharing via careful design: often eliminates data sharing even when sharing appears natural. Successor to Hurricane.
   http://www.eecg.toronto.edu/EECG/RESEARCH/ParallelSys/tornado.html