A collection of free and open source NoSQL databases including Column-Family, Document Store, Graph Database, Key-Value Database. Sourced under a creative commons. This list will be updated regularly. Email over the URL, if you wish to be included.

No-sql column-family, document store, graph database, key-value database 

Column-Family.

• Apache HBase – Hadoop database, a distributed, big data store.
• Cassandra – Distributed DBMS designed to handle large amounts of data across many servers.
• Hypertable – C++ based BigTable-like DBMS, communicates through Thrift and runs either as stand-alone or on distributed FS such as Hadoop.

Document Store.

• CouchDB – Ease of use, with multi-master replication document-oriented database system.
• ElasticSearch – Java based database, popular with log aggregation, and email archiving projects.
• MongoDB – Another document-oriented database system.
• RavenDB – Document based database with ACID/Transactional features.
• RethinkDB – Open source distributed document store database, focuses on JSON.

Graph.

• FlockDB – Twitter’s distributed, fault-tolerant graph database.
• Neo4j – Open source graph database.

Key-Value.

• Couchbase – In-memory, replicated, peristent key/value datastore.
• LevelDB – Google’s high performance key/value database.
• Redis – Networked, in-memory, key-value data store with optional durability.
• Riak – Another fault-tolerant key-value NoSQL database.

Tags: open source, big store databases, column-family NoSQL databases, document store NoSQL databases, key value database software, Graph Database software, NoSQL databases, bigtable, document based databases, graph database, open source graph database, in memory no sql database, fault tolerant databases, acid compliant document database, distributed document database, json, distributed file system

License: Awesome sysadmin – This work is licensed under a Creative Commons Attribution 4.0 ShareAlike International License | Added: tags and Introduction. Image: Unsplash License.