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.
MySQL fork maintained and used at Twitter
created at Jan. 3, 2012, 11:04 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.