😎💡Little-known but very useful DBMS
TimescaleDB takes PostgreSQL functionality and adds time series to it! Created as an extension to PostgreSQL, this database comes into its own when you deal with large-scale data that changes over time - such as data from IoT devices
FaunaDB is an online distributed transaction processing database with ACID properties. Due to this, high data processing speed and reliability are achieved. FaunaDB is based on technology pioneered by Twitter and was created as a startup by members of the social network's development team.
KeyDB is a Redis fork developed by a Canadian company and distributed under the free BSD license. There is support for multithreading
Riak (KV) is a distributed NoSQL key-value database. Riak CS is designed to provide simplicity, availability, distribution of cloud storage of any scale, and can be used to build cloud architectures - both public and private - or as infrastructure storage for highly loaded applications and services.
InfluxData is designed to monitor metrics and events in the infrastructure. The main focus is storing large amounts of time-stamped data (such as monitoring data, application metrics, and sensor readings) and processing them under high write load conditions.