Apache IoTDB
Mirror of Apache Phoenix
CDC Connectors for Apache Flink
TypeDB: a strongly-typed database
Toolkit for working with and mapping geospatial data
A Java SQL client for any JDBC compliant database
A powerful, cross platform, SQL database system
Relational Database
An object relational-mapping (ORM) library for Java
a set of foundation classes for database engines
A generator of DTO, Model, and DAO classes to access relational DB
Database Subsetter and Relational Data Browser
Database Replication, Filtered Synchronization, and Transformation
DAO for all database server types with the Java POJO code generator
HHDB SQL Admin is a graphical PostgreSQL client written in Java.
ORBIT : Operating Business Intelligence Tool
Relative Examples and Resources of iBoxDB, etc...
Java persistence using JDO, JPA or REST