LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.
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🚀 A Complete Fast Android Networking Library that also supports HTTP/2 🚀
MockServer is an HTTP(S) mock server and proxy for testing that lets you mock APIs, inspect and modify live traffic, and inject failures. It supports HTTP/1.1, HTTP/2, gRPC, WebSockets, TCP and more on a single port, with additional support for HTTP/3, message brokers, and AI/LLM APIs.
- mock-server
- proxy
- java-client
- javascript-client
A graph database that supports more than 100+ billion data, high performance and scalability (Include OLTP Engine & REST-API & Backends)
- database
- graph-database
- graph
- gremlin
Provides support to increase developer productivity in Java when using MongoDB. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
Spring Integration provides an extension of the Spring programming model to support the well-known Enterprise Integration Patterns (EIP)
- spring
- java
- eip
- microservices
Simple API, Complex Emails (Jakarta Mail smtp wrapper)
- java
- java-mail
- outlook
- batch-processing
jquick‑curl: Java library to run raw curl commands, support copy‑paste curl from Postman/Apifox/Browser DevTools, no need to write HTTP client code.
- antlr4
- copy-paste
- curl
- curl-parser
Microserver is a Java 8 native, zero configuration, standards based, battle hardened library to run Java Rest Microservices via a standard Java main class. Supporting pure Microservice or Micro-monolith styles.
- microservices
- rest
- jersey
- spring
The Stack Overflow clone for your team (self-hosted or hosted)
- stackoverflow
- stackoverflow-questions
- questions-and-answers
- java
GraphQL language support for WebStorm, IntelliJ IDEA and other IDEs based on the IntelliJ Platform.
- graphql
- webstorm
- intellij
- apollo
🚀 fast JavaScript 4 Eclipse Vert.x
- vertx
- language-support
- javascript
- typescript
Provide support to increase developer productivity in Java when using Neo4j. Uses familiar Spring concepts such as a template classes for core API usage and lightweight repository style data access.
The Java microservice lib. QBit is a reactive programming lib for building microservices - JSON, HTTP, WebSocket, and REST. QBit uses reactive programming to build elastic REST, and WebSockets based cloud friendly, web services. SOA evolved for mobile and cloud. ServiceDiscovery, Health, reactive StatService, events, Java idiomatic reactive programming for Microservices.
- qbit
- java
- microservice
- websocket-support
Microservices library - scalecube-services is a high throughput, low latency reactive microservices library built to scale. It features: API-Gateways, service-discovery, service-load-balancing, the architecture supports plug-and-play service communication modules and features. built to provide performance and low-latency real-time stream-processing
- microservices
- reactive-streams
- distributed-systems
- service-mesh
OpenDJ is an open-source LDAP directory server written in Java. It provides robust, scalable, and secure directory services for identity management, access control, and authentication in enterprise environments. OpenDJ supports LDAPv3 standard, replication, REST APIs, and high-performance
- ldap-server
- ldap
- opendj
- rest
JVM support for Apollo Federation
- federation
- graphql
- java
- spring-graphql
Admin interface for MongoDB built using Django and Bootstrap. Features a JSON editor written in JavaScript that supports nested JSON objects.
Support for reading and writing Google Protocol Buffer objects within Dropwizard
- dropwizard
- protocol-buffers
- java
- protobuf
Add support for Server-Sent-Events in Vert.x Web
- java
- vertx-web
- sse
- vertx
GraphQL-Java add-on that adds support for Schema Generation & Execution for enterprise level applications.
A JMeter plugin supports load test gRPC
- jmeter-plugin
- benchmark
- load-testing
- grpc
Adapter for Apache Wicket to support JAX-RS through embedding Jersey
- wicket
- jersey
- jersey2
- jax-rs
Demo of high performance AI model (pmml export) evaluator api base on Vert.x, Supports dynamic routing configuration for multiple pmml models via JSON
- pmml
- ai
- java-pmml
- verticle