One advanced and mature open-source MPP
Apache IoTDB
Import OpenStreetMap data into a PostgreSQL/PostGIS database
DuckDB is an in-process SQL OLAP Database Management System
Database subsetting and relational data browsing tool
Graph database optimized for fast analysis
A most popular sql audit platform for mysql
A Modern Embedded SQL Database written in Rust
A graph database that supports more than 100+ billion data
Apache Impala
CursusDB is an open-source distributed in-memory database
MySQL Proxy using Java NIO based on Sharding SQL, Calcite
TensorBase is a new big data warehousing with modern efforts
Schema and data analyzer for MongoDB written in Go
World's first open source data quality & data preparation project
UNIX Performance Monitoring / Trend Analysis Java Software
Profiler for Oracle extended SQL trace files