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The java implementation of Apache Dubbo. An RPC and microservice framework.
ZXing ("Zebra Crossing") barcode scanning library for Java, Android
Conductor is an event driven agentic workflow engine providing durable and highly resilient execution engine for applications and AI Agents
FlatBuffers: Memory Efficient Serialization Library
Redisson: Valkey & Redis Java Client and Real-Time Data Platform. Sync/Async/RxJava/Reactive API. Extends Valkey and Redis with over 60 objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Spring, Tomcat, Scheduler, JCache API, Hibernate, RPC, local cache..
CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。
The Java gRPC implementation. HTTP/2 based RPC
An asynchronous, callback-based Http client for Android built on top of Apache's HttpClient libraries.
Efficient reliable UDP unicast, UDP multicast, and IPC message transport
H2O is an Open Source, Distributed, Fast & Scalable Machine Learning Platform: Deep Learning, Gradient Boosting (GBM) & XGBoost, Random Forest, Generalized Linear Modeling (GLM with Elastic Net), K-Means, PCA, Generalized Additive Models (GAM), RuleFit, Support Vector Machine (SVM), Stacked Ensembles, Automatic Machine Learning (AutoML), etc.
Asynchronous, non-blocking HTTP & WebSocket client for the JVM
A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.
TwelveMonkeys ImageIO: Additional plug-ins and extensions for Java's ImageIO
Elixir plugin for JetBrain's IntelliJ Platform (including Rubymine)
Artificial Intelligence framework for games based on libGDX or not. Features: Steering Behaviors, Formation Motion, Pathfinding, Behavior Trees and Finite State Machines
A Java library for capturing, crafting, and sending packets.
A networking framework that evolves with your application
🔐 Tutorial of setting up Security for your API with one way authentication with TLS/SSL and mutual authentication for a java based web server and a client with both Spring Boot. Different clients are provided such as Apache HttpClient, OkHttp, Spring RestTemplate, Spring WebFlux WebClient Jetty and Netty, the old and the new JDK HttpClient, the old and the new Jersey Client, Google HttpClient, Unirest, Retrofit, Feign, Methanol, vertx, Scala client Finagle, Featherbed, Dispatch Reboot, AsyncHttpClient, Sttp, Akka, Requests Scala, Http4s Blaze, Kotlin client Fuel, http4k, Kohttp and ktor. Also other server examples are available such as jersey with grizzly. Also gRPC, WebSocket and ElasticSearch examples are included
A Java library to use the OpenAI Api in the simplest possible way.
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Nuts Java Package Manager
Declarative UI for Java
Fast, safe, complete libvips bindings for image processing in Java / JVM projects