JCR / Jackrabbit itself fits nicely into one of the many definitions of NoSQL, if you look at the unstructured data part of it.
Using other NoSQL storages as Jackrabbit's internal persistence implementation (persistence manager or data store) is possible and some attempts have been made, but it doesn't bring much value, as the interesting feature set of JCR is implemented on top of that anyway. The only advantage would be if you already have & use NoSQL storage X and want to consolidate all data there.
Is there any nosql support for jackrabbit? Looking through the code and the issue trackers i can't see anything. I also didn't see any indication on the roadmap of plans for the future. Your response is appreciated as i'd like to take a look at adding this support
Developer // Adobe (Day) // Berlin - Basel