Math Parser: Java, C#, C++, Kotlin, Android, and all .NET platforms
Catch common Java mistakes as compile-time errors
Build cross-platform native progressive web apps for iOS and Android
Reactive Extensions for the JVM
Java bytecode engineering toolkit
Most popular Mocking framework for unit tests written in Java
DBMS supporting graph, document, full-text and geospatial models
Apache Shiro
A Java library for sending APNs (iOS/macOS/Safari)
Make writing Java http clients easier
Vaadin 6, 7, 8 is a Java framework for modern Java web applications
Open-source, cross platform Qt based IDE for reverse-engineering
Modern JavaFX CSS theme collection with additional controls
Open source routing engine for OpenStreetMap
Examples, server integrations for generating Swagger API Specification
Flexible level editor
Cross-platform framework for building truly native mobile apps
Parser generator to read, process, or translate structured text
Containerize your Java application
Enterprise-Grade Open-Source Network Management Platform
Library for OpenAPI 3 with spring-boot
Standalone Git GUI based on EGit
jOOQ is the best way to write SQL in Java
An implementation of the DNS protocol in Java
The MongoDB drivers for Java, Kotlin, and Scala