Apache IoTDB
A graph database that supports more than 100+ billion data
A high performance real-time analytics database
TypeDB: a strongly-typed database
Toolkit for working with and mapping geospatial data
jdl is a loader utility for moving data from (CSV or XML) into a db.
An object relational-mapping (ORM) library for Java
A Java SQL client for any JDBC compliant database
A powerful, cross platform, SQL database system
Relational Database
Database Subsetter and Relational Data Browser
A Database System for Metamodeling and Method Engineering
DAO for all database server types with the Java POJO code generator
Java persistence using JDO, JPA or REST
A generator of DTO, Model, and DAO classes to access relational DB
Database Replication, Filtered Synchronization, and Transformation
Relative Examples and Resources of iBoxDB, etc...