IntelliJ IDEA & IntelliJ Platform
Slack Developer Kit (including Bolt for Java) for any JVM languages
A Socket.IO client library for Java
Dex to Java decompiler
Java library to create bots using Telegram Bots API
Telegram Bot API for Java
LINE Messaging API SDK for Java
The official AWS X-Ray Auto Instrumentation Agent for Java
The modern Java bytecode editor
The Java agent for Apache SkyWalking
Java client for Kubernetes & OpenShift
SonarSource Static Analyzer for Java Code Quality and Security
The official AWS X-Ray Recorder SDK for Java
A reverse engineering suite (decompiler, editor, debugger and more)
Apache NetBeans
Decompiler from Java bytecode to Java, used in IntelliJ IDEA
Flexible, lightweight multi-language test reporting tool
Library to stream in rtmp and rtsp for Android. All code in Java
Programmer-friendly testing framework for Java and the JVM
The modern Essentials suite for Spigot and Paper
Barcode scanning library for Java, Android
Fast, scalable, multi-language and extensible build system
VisualVM is an All-in-One Java Troubleshooting Tool
A tool for reverse engineering Android apk files
A Java serialization/deserialization library to convert Java Objects