Design patterns implemented in Java

Termux - a terminal emulator application for Android OS extendible by variety of packages.

Google core libraries for Java

Getting Started with Spring Boot 3:

Open Source Identity and Access Management For Modern Applications and Services

GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

Graphs for Everyone

Most popular Mocking framework for unit tests written in Java

Apache Pulsar - distributed pub-sub messaging system

Git Server with CI/CD, Kanban, and Packages. Seamless integration. Unparalleled experience.

Vert.x is a tool-kit for building reactive applications on the JVM

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

Free implementation of Play Services

Realm is a mobile database: a replacement for SQLite & ORMs

Apereo CAS - Identity & Single Sign On for all earthlings and beyond.

Java JWT: JSON Web Token for Java and Android

A Java API for generating .java source files.

Resilience4j is a fault tolerance library designed for Java8 and functional programming

Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process …

Server supporting the Signal Private Messenger applications on Android, Desktop, and iOS

A compact and highly efficient workflow and Business Process Management (BPM) platform for developers, system admins and business users.

Distributed and fault-tolerant realtime computation: stream processing, continuous computation, distributed RPC, and more

Tools for keeping your cloud operating in top form. Chaos Monkey is a resiliency tool that helps applications tolerate random instance failures.

Examples and server integrations for generating the Swagger API Specification, which enables easy access to your REST API

GoCD - Continuous Delivery server main repository

Java DSL for easy testing of REST services

High-quality QR Code generator library in Java, TypeScript/JavaScript, Python, Rust, C++, C.

Gephi - The Open Graph Viz Platform

Generate Java types from JSON or JSON Schema and annotate those types for data-binding with Jackson, Gson, etc