SQL
https://www.mysql.fr
https://mariadb.org
http://www.postgresqlfr.org
NoSQL
https://redis.io
https://pouchdb.com/
https://www.elastic.co/
http://couchdb.apache.org
https://www.rethinkdb.com
https://www.kinto-storage.org
File & memory
https://gun.js.org
https://github.com/techfort/LokiJS
https://github.com/agershun/alasql
https://github.com/typicaljoe/taffydb
https://github.com/louischatriot/nedb
Big Data
http://cassandra.apache.org/
http://hbase.apache.org/
http://basho.com/products/riak-kv/
Time Series
https://www.influxdata.com/time-series-platform/influxdb/
Graph (orienDB is hybrid, neo4j focuses on graph)
http://orientdb.com/
https://neo4j.com/
https://lemag.sfeir.com/transformez-vos-donnees-csv-rdf/