Dex to Java decompiler
IntelliJ IDEA & IntelliJ Platform
The modern Java bytecode editor
Free implementation of Play Services
A tool for reverse engineering Android apk files
A powerful text/code editor for Android
Autopsy® is a digital forensics platform and graphical interface
Now continued as OculiX — see oculix.org
Apache NetBeans
Decompiler from Java bytecode to Java, used in IntelliJ IDEA
A reverse engineering suite (decompiler, editor, debugger and more)
GmsCore fork for ReVanced with Material You, features and improvements
The OWASP ZAP core project
Barcode scanning library for Java, Android
Browser automation framework and ecosystem
Programmer-friendly testing framework for Java and the JVM
Easily create Spring-powered, production-grade applications
The modern Essentials suite for Spigot and Paper
Desktop/Android/HTML5/iOS Java game development framework
SoapUI is a free and open source cross-platform functional testing
Distributed tracing system to gather timing data
Apache Log4j 2 is a versatile, feature-rich, efficient logging API
Application Performance Monitoring System
A reference implementation of a JSON package in Java
Essential hooks for modding with Fabric