Nebula

ClickHouse is a real-time analytics database management system

CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries.

Scalable graph analytics database powered by a multithreaded, vectorized temporal engine, written in Rust

High-performance, scalable time-series database designed for Industrial IoT (IIoT) scenarios

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse.