OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID Transactions, Full-Text indexing and Reactive Queries.
created at Dec. 9, 2012, 8:33 p.m.
Percona TokuDB is a high-performance, write optimized, compressing, transactional storage engine for Percona Server. Issue tracker: https://tokutek.atlassian.net/browse/DB/ Wiki: https://github.com/Percona/tokudb-engine/wiki Downloads:
created at April 17, 2013, 10:43 p.m.
groupcache is a caching and cache-filling library, intended as a replacement for memcached in many cases.
created at July 22, 2013, 9:55 p.m.
Scalable datastore for metrics, events, and real-time analytics
created at Sept. 26, 2013, 2:31 p.m.
Columnar storage extension for Postgres built as a foreign data wrapper. Check out https://github.com/citusdata/citus for a modernized columnar storage implementation built as a table access method.
created at April 3, 2014, 11:24 a.m.
Aerospike Database Server – flash-optimized, in-memory, nosql database
created at March 8, 2018, 12:59 a.m.