Node.js offers several microservice frameworks that simplify the development and management of microservices-based applications. These frameworks provide tools and conventions for building scalable, decoupled services that communicate via APIs. Here are some popular Node.js microservice frameworks:

1. Express.js:

• While primarily known as a web framework, Express.js can be used to build microservices due to its minimalistic and flexible nature.
• Express can handle HTTP routing, middleware, and request handling, making it suitable for building lightweight microservices.

2. Seneca:

• Seneca is a microservices toolkit for Node.js that provides a plugin-based architecture for building distributed systems.
• It focuses on creating small, composable services that can be combined to achieve complex workflows.
• Seneca supports various transport mechanisms for inter-service communication, including HTTP, TCP, and message queues.

3. NestJS:

• NestJS is a progressive Node.js framework for building efficient, reliable, and scalable server-side applications.
• It uses TypeScript and follows Angular-inspired architecture principles, including modules, controllers, services, and decorators.
• NestJS supports microservices development with built-in support for message-based communication using libraries like NATS or Redis.

4. moleculer:

• Moleculer is a modern microservices framework for Node.js that provides features like service discovery, load balancing, fault tolerance, and circuit-breaking.
• It supports multiple communication protocols such as HTTP, TCP, and NATS, and integrates with popular service registries like Consul and etcd.
• Moleculer simplifies microservices development with its built-in features and plugins.

5. Micro:

• Micro is a minimalistic microservices framework for Node.js designed for building HTTP-based microservices.
• It focuses on simplicity and provides tools for developing small, single-purpose services that can be deployed independently.
• Micro is suitable for building API-driven applications using Node.js.

6. Fastify:

• Fastify is a fast and low-overhead web framework for Node.js, optimized for performance.
• While not specifically a microservices framework, Fastify's lightweight design and plugin system make it suitable for building microservices.
• Fastify supports various communication strategies for microservices, including HTTP and messaging queues.

These Node.js microservice frameworks offer different features and design philosophies, catering to various use cases and preferences. When choosing a framework for your microservices architecture, consider factors such as ease of development, scalability, performance, community support, and integration capabilities with other technologies in your stack.