MillenniumDB is a graph-oriented database management system by IMFD, aiming to provide a functional DBMS for testing new database and graph algorithms. They support RDF with SPARQL, and have a custom language for Property Graphs, with plans to add GQL support soon. The project is still in development, with some missing functionality and bugs. A unique feature is the handling of data, like not differentiating between different boolean representations. Building MillenniumDB requires specific dependencies and installation steps, including using Docker for Windows/Mac. Methods for creating a database, running the server, and querying are detailed, with examples given. Docker support is also available.
https://github.com/MillenniumDB/MillenniumDB