OpenRefine is a free, open source power tool for working with messy data and improving it

Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.

Open-Source Subscription Billing & Payments Platform

NOTE: This repo (The Clojure programming language) has moved:

Rapid API Development with MongoDB

Open source IaC Automation and Collaboration Software.

ReplicaDB is open source tool for database replication, designed for efficiently transferring bulk data between relational and non-relational databases

ONgDB is an independent fork of Neo4j® Enterprise Edition version 3.4.0.rc02 licensed under AGPLv3 and/or Community Edition licensed under GPLv3

Embedded Key Value Java Database

FUSE implementation in Java using Java Native Runtime (JNR)

Emergency Service Drools Application

An RDF TripleStore in Java