[anthk]

GNU/Hurd it's interesting. It replicates Unix, but it gives far more power to the user.

[pjmlp]

Interesting are systems like Xerox PARC Workstations (Mesa, Cedar, Smalltalk, Interlisp-D), ETHZ Oberon, Inferno, Apollo/Domain, Tru64, QNX.

[anthk]

QNX it's another Unix in the end any the Photon GUI it's nothing odd to any KDE/Windows 2000 user.

Smalltalk has issues on exporting your software to be run under a standalone way.

On Interlisp, there's Mezzano, a Common Lisp OS, but it needs some tweaks and optimizations.

Oberon UI wise it's the same as Acme under p9/9front/p9port. On Inferno, 9front and Go superseded it in some ideas.

[lproven]

Gilad Bracha is working on that with Newspeak:

https://www.bracha.org/Site/Newspeak.html

[igouy]

> Smalltalk has issues on exporting your software to be run under a standalone way.

What issues?

[snvzz]

Do not forget Genode.