Official site of GNUstep: free implementation of NeXTStep/OpenStep specification.

Tiny Java OS for Lego RCX brick. Like its predecessor TinyVM, has tiny Java runtime, under 32K; works as replacement firmware for Lego; Hitachi H8300 processor. To be ported to more small devices. [Open Source, Mozilla]

Goals: all Java OS, flat memory model, for personal use, simple to use and install, any Java applications to run on it fast and safe. Descriptions, documents, screenshots, downloads. Open Source, LGPL.

Object-based framework to implement network protocols; defines an interface that protocols use to invoke operations on one another (i.e., to send messages to and receive messages from adjacent protocols) and a set of libraries to manipulate messages, ...

Orthogonally persistent, capability-based secure SASOS using L4 2nd generation microkernel. Goals: Prove SASOSs can run on normal hardware, be as secure as normal OSs; can be as efficient as, and are faster than, normal OSs in some important uses; can...

Makes JX OS: set of Java components executes on core doing system initialization, CPU context switching, low-level domain management; code organized as components loaded into domains, verified, translated to native code; protection based on type safet...

Modern object-orientated microkernel, focus: flexibility and functionality, instead of speed and compatibility. Coded in C. Description, downloads. [Open Source, GPL]

Minimal OS kernel for PC based server appliances. Lets you run java server applications without need to install host OS, only need normal Java HotSpot VM and Sanos. Description, documents, downloads, manifesto, links, contact. [Open Source, BSD]

Component-based OS, runs natively on i80386+ based PCs. Has novel protection mechanism allowing more OS decomposition and high performance: protection overheads almost 1, 000 times less than normal OSs. [Open Source, GPL]

Object Operating System, OOS, pronounced ooze; goal: create new OS architecture, which uses filesystem to do many jobs usually done via various means. Design philosophy inspired by Unix, Plan 9, but does many things uniquely, trades compatibility for ...