Stars
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex di…
a fast, scalable, multi-language and extensible build system
OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)
JDK main-line development https://openjdk.org/projects/jdk
High Performance Inter-Thread Messaging Library
Apache Pulsar - distributed pub-sub messaging system
Microservice Architecture with Spring Boot, Spring Cloud and Docker
Conductor is a microservices orchestration engine.
AWS Service registry for resilient mid-tier load balancing and failover.
jsoup: the Java HTML parser, built for HTML editing, cleaning, scraping, and XSS safety.
The Metadata Platform for your Data and AI Stack
Resilience4j is a fault tolerance library designed for Java8 and functional programming
Asynchronous Http and WebSocket Client library for Java
Micronaut Application Framework
Advanced Java Redis client for thread-safe sync, async, and reactive usage. Supports Cluster, Sentinel, Pipelining, and codecs.
Picocli is a modern framework for building powerful, user-friendly, GraalVM-enabled command line apps with ease. It supports colors, autocompletion, subcommands, and more. In 1 source file so apps …
H2 is an embeddable RDBMS written in Java.
The official AWS SDK for Java 1.x (In Maintenance Mode, End-of-Life on 12/31/2025). The AWS SDK for Java 2.x is available here: https://github.com/aws/aws-sdk-java-v2/
The official MongoDB drivers for Java, Kotlin, and Scala
An extremely easy way to perform background processing in Java. Backed by persistent storage. Open and free for commercial use.
Java library for parsing and rendering CommonMark (Markdown)
Spring Boot starter module for gRPC framework.