MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.

Sqitch - Sqitch is a standalone database change management application without opinions about your database engine, development environment, or application framework.

Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.

Liquibase - Database schema change management and release automation solution.

ArangoDB - A distributed open-source database with a flexible data model for documents, graphs, and key-values.

Flyway - Flyway is a database migration tool.