See also: Database Families.

Documents Oriented Databases and Key-Value Stores

• CouchDB - Seamless multi-master sync, scales from mobile to global clusters
• MongoDB - The most popular NoSQL database
• RethinkDB - The open-source database for the realtime web

Graph Oriented Databases

Geographic Information Systems

• postgis

Relational Databases

Relational database search tree: http://howfuckedismydatabase.com/

• MySQL - The world’s most popular open source database
• PostgreSQL

Round Robin / Time Series Oriented Databases

• Time Series Oriented Databases (TSDB)

Previously on homepage, sorting needed

• Presto