Linux kernel is described as 'The Linux kernel is the core component of the Linux operating system. It's responsible for managing the system's resources and facilitating communication between hardware and software. It was first created by Linus Torvalds in 1991 and is open-source, allowing for' and is a very popular operating system in the os & utilities category. There are more than 10 alternatives to Linux kernel for a variety of platforms, including Linux, Mac, BSD, Self-Hosted and Windows apps. The best Linux kernel alternative is FreeBSD, which is both free and Open Source. Other great apps like Linux kernel are Linux-libre, OpenBSD, GNU Hurd and MINIX 3.
Nanos is a new kernel designed to run one and only one application in a virtualized environment. It has several constraints on it compared to a general purpose operating system such as Windows or Linux - namely it's a single process system with no support for running...
illumos is a free and open-source Unix operating system. It derives from OpenSolaris, which in turn derives from SVR4 UNIX and Berkeley Software Distribution (BSD). illumos comprises a kernel, device drivers, system libraries, and utility software for system administration.
Risc OS is an open-source OS specifically designed to run on the ARM chipset.
It is an OS, not a kernel!
Darwin is the Open Source operating system from Apple that forms the basis for Mac OS X, and PureDarwin is a community project to make Darwin more usable (some people think of it as the informal successor to OpenDarwin.
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Good for retro-styled machines