None that I'm aware of. I had started to investigate one that would also
map to NoSQL databases, but it's just in the experimental phase and I
probably won't have time to actually finish it:
dotter

Thanks.

In light of absence of support of ORM, I'll probably just use a non-DB solution. My data size is not very vast, so I may be able to load it all up in memory and simply use files as a backing store.

Vibe.d does need a good ORM module for bigger websites though. Everything else in Vibe.d is looking pretty good and highly useable.