Directory: packages/grpc-native-core (see here for installation information)
npm package: grpc.
This is the existing, feature-rich implementation of gRPC using a C++ addon. It works on all LTS versions of Node.js on most platforms that Node.js runs on.
Directory: packages/grpc-js-core
This library is currently incomplete and experimental, built on the experimental http2 Node module.
This library implements the core functionality of gRPC purely in JavaScript, without a C++ addon. It works on the latest version of Node.js (with the --expose-http2 flag set) on all platforms that Node.js runs on.
Directory: packages/grpc-tools
npm package: grpc-tools
Distribution of protoc and the gRPC Node protoc plugin for ease of installation with npm.
Directory: packages/grpc-health-check
npm package: grpc-health-check
Health check service for gRPC servers.