Design patterns implemented in Java

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

A high performance caching library for Java

Android library to observe scroll events on scrollable views.

Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

A damn simple library for building production-ready RESTful web services.

Free and open log management

Java DSL for easy testing of REST services

Runtime code generation for the Java virtual machine.

Open source routing engine for OpenStreetMap. Use it as Java library or standalone web server.

Asynchronous Http and WebSocket Client library for Java

Automated JSON API documentation for API's built with Spring

Open-Source Subscription Billing & Payments Platform

Keep your code spotless

Non-Blocking Reactive Foundation for the JVM

Yahoo! Cloud Serving Benchmark

Alibaba Dragonwell8 JDK

Jodd! Lightweight. Java. Zero dependencies. Use what you like.

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

Micro second messaging that stores everything to disk

Google Reader inspired self-hosted personal RSS reader.

Implementation of Algorithms and Data Structures, Problems and Solutions

Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.

VisualVM is an All-in-One Java Troubleshooting Tool

High Performance data structures and utility methods for Java

Solutions for some common algorithm problems written in Java.

an open source geocoder for openstreetmap data

Intelligent object mapping

The Jdbi library provides convenient, idiomatic access to relational databases in Java and other JVM technologies such as Kotlin, Clojure or Scala.