SOFARPC is a high-performance, high-extensibility, production-level Java RPC framework.
Lightweight REST for Java
Java language framework rpc source code implementation
A simple RPC framework based on Netty, ZooKeeper and Spring
JRPC is a lightweight Java RPC framework
Pure Java implementation of ONCRPC/SUNRPC
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, Retrofit, Reactive Streams, Spring Boot and Dropwizard.