PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
OpenTSDB - OpenTSDB is a distributed, scalable Time Series Database (TSDB) written on top of HBase.
MySQL - The world's most popular open source database
Tile38 - Geospatial database and real-time geofence server for managing fleets, mobile apps, and IoT devices.
Microsoft SQL - Microsoft SQL is a best in class relational database management software that facilitates the database server to provide you a primary function to store and retrieve data.
BuntDB - A fast, embeddable, in-memory key/value database for Go with custom indexing and geospatial support