Is there any NoSQL data store that is ACID compliant?

"NoSQL" is not a well-defined term. It's a very vague concept. As such, it's not even possible to say what is and what is not a "NoSQL" product. Not nearly all of the products typcially branded with the label are key-value stores.

Yes, MarkLogic Server is a NoSQL solution (document database I like to call it) that works with ACID transactions

To add to the list of alternatives, another fully ACID compliant NoSQL database is GT.M.

db4o

Unlike roll-your-own persistence or serialization, db4o is ACID transaction safe and allows for querying, replication and schema changes during runtime

http://www.db4o.com/about/productinformation/db4o/

Wait is over.

ACID compliant NoSQL DB is out ----------- have a look at citrusleaf