Stream Processing and Complex Event Processing Engine
Core part of Jackson that defines Streaming API
Examples, server integrations for generating Swagger API Specification
BotCity Framework - Open Source RPA
ProtonVPN Android app
Free implementation of Play Services
The OWASP ZAP core project
Barcode scanning library for Java, Android
A reverse engineering suite (decompiler, editor, debugger and more)
Most popular Mocking framework for unit tests written in Java
Main Liquibase Source
Application Performance Monitoring System
Hibernate's core object/relational mapping functionality
iText for Java represents the next level of SDKs for developers
Stanford CoreNLP, a Java suite of core NLP tools
Native Operating System and Hardware Information
Apache Lucene open-source search software
Pure Java annotation, single class file, rapid development
Clean object-oriented & layered architecture
An extensible request/response workbench
Red5 Server core
Apache Maven core
A lightweight flexible development framework
Lightweight dependency injection framework for Java 6 and above
A fast Java JSON schema validator that supports draft V4, V6, V7, V201