3 unknown operating systems

We are familiar with the regular operating systems like: Windows, Linux, Mac, and mobile OS, Android, iOS, Windows, etc. 

Here are 3 operating systems, free and opensource which are written from scratch ,not based on the linux kernel.

You can download them for free and try with a live usb flash or using VirtualBox.

1. ReactOS

ReactOS is a free and opensource Operating System that looks like Windows and is able to run many Windows applications. Its kernel is written from scratch, is not a Linux-based system,  but the OS makes use of Wine to be able to run Windows applications.

Website: reactos.org

2. Haiku OS

Haiku is a free and open-source operating system, currently in development. Inspired by the BeOS, Haiku aims to become fast, efficient, simple to use. Haiku is compatible with software written for BeOS.

Website: haiku-os.org

3. Kolibri OS

Kolibri is a tiny, powerful and fast opensource OS which has forked off from MenuetOS. It's written entirely in assembly language. Kolibri features a rich set of applications that include word processor, image viewer, graphical editor, web browser and over 30 games.

Website: kolibrios.org

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