Unified Queries for Java

Clean Architecture Example (Java): Example of what clean architecture would look like (in Java)

A Java Code Generator for Pojo Builders

A Jenkins plugin to run builds inside Docker containers

A tiny framework that makes it easy to write Test Data Builders in Java

Descartes supports developers to improve their test suites by reporting weak spots in covered code

Automatically detect and generate missing assertions for Junit test cases (also known as test amplification)

The videostore example from Martin Fowler's Refactoring, and from Episode 3 of cleancoders.com

Code Kata for a two-player trading card game

Sample app of sentiment analysis as an example of hexagonal architecture