TiDB is an open source distributed HTAP database compatible with the MySQL protocol
The Prometheus monitoring system and time series database.
Fast, Distributed Graph DB
Golang in-memory database built on immutable radix trees
Scalable datastore for metrics, events, and real-time analytics
Vitess is a database clustering system for horizontal scaling of MySQL.
GitHub's Online Schema Migrations for MySQL
Fast key-value DB in Go.
BuntDB is an embeddable, in-memory key/value database for Go with custom indexing and geospatial support