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FreeOS/1 is a Free, Open Source, FreeDOS based Free and Open Source Alternative OS, with open source Microsoft Windows compatibility using HXDOSExtender KernelEx,and ReactOS source code. FreeOS/1 will include new technologies and will be easy to use5 weekly downloads
Run Linux on the Playstation 2252 weekly downloads
A microkernel operating system distribution offering (among other things) very low hardware requirements, full and easy portability and easy-readable source code.
Quantix is a microkernel operating system distribution based on the Mach kernel. Quantix uses the X windowing environment for a user interface.
Seigon Online is a new communication protocol based on packet distribution on client computers, for sharing data securely and freely. This network is mainly open to hackers for their own internal communication.