A fast SQL database that can run embedded or a server mode with support for transactions, encryption, full search, etc. Storage can be disk-based or in-memory.

Spark SQL is Apache Spark's module for working with structured data based on DataFrames.

The MyBatis SQL mapper framework makes it easier to use a relational database with object-oriented applications. MyBatis couples objects with stored procedures or SQL statements using a XML descriptor or annotations.

Thymeleaf support for MyBatis

ToPIA extension persistence module

Memory efficient Shared Strings Table implementation for POI streaming

Diamond Miner Extension of Logback Classic Module.

SchemaCrawler JDBC Drivers Distribution

jee support for cdi-test, mainly persistence

Needle4j is a light-weight framework for testing isolated Java EE components outside of the container. It reduces the test setup code by analysing injected dependencies and automatic creation of mock objects.

A generic JDBC backend for konserve.