See also: olap-analytics.md
- http://nosql-database.org/
- https://de.wikipedia.org/wiki/NoSQL
- http://bigdata-madesimple.com/18-free-and-widely-used-open-source-nosql-databases/
- Database of Databases featued!
- https://www.mongodb.com/
- https://github.com/OpenHFT/Chronicle-Map
- https://www.aerospike.com/products/product-matrix/
- https://www.unidata.ucar.edu/software/thredds/current/tds/
- https://rethinkdb.com/ (abadonned?)
- https://couchdb.apache.org/
- https://redis.io/
- https://github.com/facebook/rocksdb
- https://quarkdb.web.cern.ch/quarkdb/docs/master/
- tkrzw successor of (g)dbm
- bolt
- https://cassandra.apache.org/
- http://docs.datastax.com/en/cql/3.1/cql/cql_reference/cqlsh.html (command line tool)
- https://www.datastax.com/dev/blog/tools-for-testing-cassandra
- http://orientdb.com/orientdb/
- https://github.com/xvik/guice-persist-orient (guice integration)