Faithful spirit, Mongo query language isn't available in Java, Jongo fixes that. Copy/paste your queries to string.
Object oriented, Save & find objects into & from collections. Use embedded Jackson marshalling or your own.
Wood solid, As fast as Mongo Java driver. Open source, fully tested & made of rock solid libraries.
Documentation available at jongo.org
Java docs at https://jongo.ci.cloudbees.com/job/jongo-ci/site/apidocs/index.html