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158 stars written in Java
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Keep your code spotless

Java 5,156 493 Updated Nov 7, 2025

Non-Blocking Reactive Foundation for the JVM

Java 5,151 1,242 Updated Nov 10, 2025

Your go-to microservice framework for any situation, from the creator of Netty et al. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, R…

Java 5,035 965 Updated Nov 8, 2025

Apache Calcite

Java 4,977 2,448 Updated Nov 7, 2025

Unified Queries for Java

Java 4,924 876 Updated Oct 28, 2025

cglib - Byte Code Generation Library is high level API to generate and transform Java byte code. It is used by AOP, testing, data access frameworks to generate dynamic proxy objects and intercept f…

Java 4,879 888 Updated Aug 16, 2024

Reactive Streams Specification for the JVM

Java 4,867 534 Updated Mar 13, 2024

Java runtime metadata analysis

Java 4,770 710 Updated Jun 17, 2024

An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

Java 4,755 1,059 Updated Nov 10, 2025

Pick a date or time on Android in style

Java 4,656 940 Updated Aug 23, 2022

🔬 Java Code Coverage Library

Java 4,437 1,184 Updated Nov 8, 2025

Eclipse Jetty® - Web Container & Clients - supports HTTP/3, HTTP/2, HTTP/1, websocket, servlets, and more

Java 4,023 1,974 Updated Nov 10, 2025

Official Java client library for kubernetes

Java 3,884 2,055 Updated Nov 10, 2025

A library to reproduce the behavior of the Bottom Navigation guidelines from Material Design.

Java 3,823 684 Updated Jul 10, 2021

SpotBugs is FindBugs' successor. A tool for static analysis to look for bugs in Java code.

Java 3,768 638 Updated Nov 8, 2025

Kafka GUI for Apache Kafka to manage topics, topics data, consumers group, schema registry, connect and more...

Java 3,710 734 Updated Nov 3, 2025

Spring Boot starter module for gRPC framework.

Java 3,684 863 Updated Oct 23, 2025

General data-binding package for Jackson (2.x): works on streaming API (core) implementation(s)

Java 3,644 1,446 Updated Nov 10, 2025

Library for OpenAPI 3 with spring-boot

Java 3,595 553 Updated Nov 8, 2025

Java client for Kubernetes & OpenShift

Java 3,577 1,493 Updated Nov 4, 2025

A Java architecture test library, to specify and assert architecture rules in plain Java

Java 3,521 322 Updated Nov 10, 2025

A process for collecting metrics using JMX MBeans for Prometheus consumption

Java 3,235 1,225 Updated Nov 8, 2025

😉 Pretty nice Zookeeper GUI, Support Win / Mac / Linux Platform

Java 3,235 376 Updated Jan 9, 2024

Jasypt integration for Spring boot

Java 3,027 539 Updated Sep 6, 2025

TCP/HTTP/UDP/QUIC client/server with Reactor over Netty

Java 2,725 688 Updated Nov 7, 2025

The official MongoDB drivers for Java, Kotlin, and Scala

Java 2,650 1,489 Updated Nov 10, 2025

Java rate limiting library based on token-bucket algorithm.

Java 2,628 303 Updated Aug 24, 2025

The Hypersistence Utils library (previously known as Hibernate Types) gives you Spring and Hibernate utilities that can help you get the most out of your data access layer.

Java 2,597 385 Updated Nov 9, 2025

Bouncy Castle Java Distribution (Mirror)

Java 2,564 1,201 Updated Nov 3, 2025

Provides Familiar Spring Abstractions for Apache Kafka

Java 2,423 1,675 Updated Nov 8, 2025