Netty project - an event-driven asynchronous network application framework

Very spicy additions to the Java programming language.

OpenRefine is a free, open source power tool for working with messy data and improving it

A simple expressive web framework for java. Spark has a kotlin DSL https://github.com/perwendel/spark-kotlin

A programmer-oriented testing framework for Java — ⚠️ maintenance mode

OrientDB is the most versatile DBMS supporting Graph, Document, Reactive, Full-Text and Geospatial models in one Multi-Model product. OrientDB can run distributed (Multi-Master), supports SQL, ACID…

Event Driven WebSockets Framework with Cross-Browser Fallbacks

The reliable, generic, fast and flexible logging framework for Java.

Simple Logging Facade for Java

Brotli4j provides Brotli compression and decompression for Java.