Dead revivals ∞

[Zeta] – New Generation BeOS Solutions — The commercial re-release of BeOS. Was BeOS NG (New Generation)
- yellowtab.com died on 2006-11-24. The company started insolvency procedures 8 months earlier.
- At some point it was redirecting to www.zeta-os.com but that’s German. – (2017-01-02 it’s dead)
- As of 2017-01-02 it redirects to zeta.giga.de which is German.
BlueEyedOS
- A BeOS-inspired operating system powered by a Linux kernel. — BeOS apps require a recompile to work here.
- 2017-01-02 – Not updated since 2003-06-26
- 2020-07-02 – Officially abandoned
- See http://blueeyedos.com/index-old.html
BeFree
- A desktop operating system based on the Linux kernel and the GNU system. This project provides also an object-oriented application framework and a desktop environment, inspired by the original BeOS application programming interface, created by Be, Inc.
- Last updated 2014-10-04
- befree.berlios.de is dead
cosmoe.com
- A new user interface that runs on top of the Linux operating system (and soon others). Cosmoe implements a powerful but easy-to-use high-level C++ API that is quite similar to BeOS. In fact, many BeOS programs can be recompiled to run on Cosmoe with little or no changes!
- As of 2009-03 it hasn’t had a blog update since 2004-12.
- As of 2017-01-02 it’s dead.
dev.zebuntu.com — Zenuntu was a beos compatibility layer built on Ubuntu.
- But it wasn’t meant to be.

Ancient notes ∞

These must be really really old…