illumos

Link

https://www.illumos.org/

illumos is basically a kernel environment (similar to GNU) forked from [OpenSolaris](…/Oracle Solaris/), which was made closed-source again when Oracle purchased [Sun Microsystems](…/Sun Microsystems/).

Excerpt

illumos is a Unix [operating system](…/Operating systems/) which provides next-generation features for downstream distributions, including advanced system debugging, next generation filesystem, networking, and virtualization options.

illumos is developed by both volunteers and companies building products on top of the software.

illumos is an excellent base for both traditional and cloud-native deployments.

Resources

• [OS](…/Operating systems/)/Distributions based on illumos
  • OmniOS

    • The Open Source Enterprise Server OS with just the features you need.

  • openindiana

    • Community-driven illumos Distribution