Core Protocol Buffers library. Protocol Buffers are a way of encoding structured data in an efficient yet extensible format.

Utilities for Protocol Buffers

Hamcrest matcher library for Java

Delft Java Utilities -- Basic Classes

Core API and libraries of hamcrest matcher framework.

java.time API implementation in Scala and Scala.js

Json-LD core implementation

Javolution - Java Solution for Real-Time and Embedded Systems. This project uses template classes to generates java code for various versions of the Java run-time (e.g.

Provide serialization and de-serialization of different formats based on Google’s protobuf Message. Enables overriding the default (byte array) output to text based formats such as XML, JSON and HTML.

PMD Java