Great list. I think the reason Mongo has become so popular is because the line it straddles between SQL and NoSQL, specifically the query language. You feel rig

Great list. I think the reason Mongo has become so popular is because the line it straddles between SQL and NoSQL, specifically the query language. You feel right at home. CiuchDB is another DB I like quite a bit, but wrapping your had around writing map reduce views in order to index and execute queries is A LOT different than a select.