Golang has a growing ecosystem of frameworks and libraries for web development. Here are some popular frameworks and libraries used for web development in Go:

1. Gin: Gin is a lightweight and fast web framework for Go. It provides a simple and expressive API for building web applications and RESTful APIs. Gin is known for its high performance and minimalistic design.

2. Echo: The Echo is another lightweight and fast web framework for Go. It is designed for high performance and productivity. Echo offers powerful routing, middleware support, and a wide range of features for building web applications.

3. Fiber: Fiber is a web framework built on top of Fasthttp, a fast HTTP implementation for Go. Fiber focuses on performance and offers an easy-to-use API for building web applications. It emphasizes speed and memory efficiency.

4. Revel: Revel is a full-featured web framework for Go that follows the Model-View-Controller (MVC) architectural pattern. It provides robust features like automatic code reloading, request routing, session management, and more.

5. Buffalo: Buffalo is a batteries-included web development eco-system for Go. It aims to make the development process fast and productive by providing a set of tools, conventions, and best practices. Buffalo includes features like database migrations, asset handling, and authentication.

6. Gorilla: Gorilla is a collection of packages for web development in Go. It offers a variety of packages for tasks like routing (Mux), session management, WebSockets, and more. Gorilla packages are widely used and known for their flexibility and extensibility.

7. Chi: Chi is a lightweight and flexible router for Go web applications. It provides a minimalistic yet powerful routing API. Chi is known for its simplicity and speed.

8. Gorm: Gorm is an Object-Relational Mapping (ORM) library for Go. It simplifies database access by providing a high-level API for interacting with databases. Gorm supports various database systems and offers features like query building, data modeling, and database migrations.

9. Mux: Mux is a popular HTTP request router and dispatcher for Go. It allows you to define routes and handlers for different URL patterns. Mux provides a straightforward and flexible way to handle HTTP requests.

These are just a few examples of the popular frameworks and libraries used for web development in Go. The Go ecosystem continues to evolve, and new frameworks and libraries are being developed to cater to different use cases and preferences.