HelenOS

HelenOS is a portable microkernel-based multiserver operating system designed and implemented from scratch.

Operating system · helenos.org

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What HelenOS’s own pages say

What it says it doesHelenOS is a portable microkernel-based multiserver operating system designed and implemented from scratch. helenos.org
Open sourceYes helenos.org
LicenseIts source code is available under the BSD license. helenos.org

Each value is a quote AirStack found on the product’s own pages, read 2026-11-04. A missing field means AirStack has not found it on its pages.