Yeah -- when I saw a redesigned website at freevms.net, my heart skipped a beat, I thought FreeVMS might still be alive. I couldn't track jkb's original tree anymore and figured I'd link to that Github project instead, as it had a few additional commits and, thus, a higher chance of running on more recent emulators.
First, the code around the L4 kernel (Pistachio) is still available. I've cloned it to github here so as to not overload jkb's personal server (still in the origin):
Edit: https://github.com/rroart/freevms . It's definitely not big and professional like OpenVMS :-)