1. https://github.com/hoisie/web

比较轻量，仅包含简单的核心路由分发，极简脚手架。

package main
    
import (
    "github.com/hoisie/web"
)
    
func hello(val string) string { return "hello " + val } 
    
func main() {
    web.Get("/(.*)", hello)
    web.Run("0.0.0.0:9999")
}

2. https://github.com/gocraft/web

提供路由和中间件功能。
路由注册时写入一个通用的上下文，可以在中间件和后续的业务处理中操作。

func (c *YourContext) UserRequired(rw web.ResponseWriter, r *web.Request, next web.NextMiddlewareFunc) {
    user := userFromSession(r)  // Pretend like this is defined. It reads a session cookie and returns a *User or nil.
    if user != nil {
        c.User = user
        next(rw, r)
    } else {
        rw.Header().Set("Location", "/")
        rw.WriteHeader(http.StatusMovedPermanently)
        // do NOT call next()
    }
}

gocraft 提供了一个用于构建 Web 应用程序的工具包。目前这些包可用：

https://github.com/gocraft/web - Go Router + Middleware. Your Contexts.
https://github.com/gocraft/dbr - Additions to Go's database/sql for super fast performance and convenience.
https://github.com/gocraft/health - Instrument your web apps with logging and metrics.
https://github.com/gocraft/work - Process background jobs in Go.

3. https://github.com/go-martini/martini

提供了优雅的路由实现，以及服务注入功能，可惜框架已经不再维护。

m.Get("/", func() (int, string) {
  return 418, "i'm a teapot" // HTTP 418 : "i'm a teapot"
})

m.Get("/", func(res http.ResponseWriter, req *http.Request) { // res and req are injected by Martini
  res.WriteHeader(200) // HTTP 200
})

注入 db

db := &MyDatabase{}
m := martini.Classic()
m.Map(db) // the service will be available to all handlers as *MyDatabase
// ...
m.Run()

包含比较丰富的中间件，比如
https://github.com/martini-contrib/binding

type ContactForm struct {
    Name    string `form:"name" binding:"required"`
    Email   string `form:"email"`
    Message string `form:"message" binding:"required"`
}
m.Post("/contact/submit", binding.Bind(ContactForm{}), func(contact ContactForm) string {
    return fmt.Sprintf("Name: %s\nEmail: %s\nMessage: %s\n",
        contact.Name, contact.Email, contact.Message)
})

4. https://github.com/labstack/echo

和 gin 极其相似，对标 Gin 的一款框架。包含路由、中间件、参数解析等主要web功能。在官方文档中描述性能优于Gin。
社区健全，文档完善。

package main

import (
    "net/http"
    
    "github.com/labstack/echo/v4"
)

func main() {
    e := echo.New()
    e.GET("/", func(c echo.Context) error {
        return c.String(http.StatusOK, "Hello, World!")
    })
    e.Logger.Fatal(e.Start(":1323"))
}

// Root level middleware
e.Use(middleware.Logger())
e.Use(middleware.Recover())

// Group level middleware
g := e.Group("/admin")
g.Use(middleware.BasicAuth(func(username, password string, c echo.Context) (bool, error) {
  if username == "joe" && password == "secret" {
    return true, nil
  }
  return false, nil
}))

// Route level middleware
track := func(next echo.HandlerFunc) echo.HandlerFunc {
    return func(c echo.Context) error {
        println("request to /users")
        return next(c)
    }
}
e.GET("/users", func(c echo.Context) error {
    return c.String(http.StatusOK, "/users")
}, track)

https://github.com/gofiber/fiber

对标Express，构建于Fasthttp 之上，高性能，低内存占用。

package main

import (
    "github.com/gofiber/fiber/v2"
    "github.com/gofiber/template/pug"
)

func main() {
    // You can setup Views engine before initiation app:
    app := fiber.New(fiber.Config{
        Views: pug.New("./views", ".pug"),
    })

    // And now, you can call template `./views/home.pug` like this:
    app.Get("/", func(c *fiber.Ctx) error {
        return c.Render("home", fiber.Map{
            "title": "Homepage",
            "year":  1999,
        })
    })

    log.Fatal(app.Listen(":3000"))
}

同样构建在 fasthttp 上的还有：
https://github.com/qiangxue/fasthttp-routing
https://github.com/fasthttp/router
https://github.com/vincentLiuxiang/lu
https://github.com/gogearbox/gearbox
包含了简单的路由功能。
https://github.com/savsgio/atreugo
路由+响应封装

https://github.com/gobuffalo/buffalo

提供生成项目脚手架，完整、完善的框架。可以通过命令行生成代码，对标 ruby。

├── .yarn/
├── actions/
│    ├── app.go
│    └── render.go
├── assets/
├── cmd/
│    └── app/
│        └── main.go
├── config/
├── fixtures/
├── grifts/
├── locales/
├── models/
├── public/
├── templates/
├── .babelrc
├── .buffalo.dev.yml
├── .codeclimate.yml
├── .docketignore
├── .env
├── .gitignore
├── .pnp.loader.mjs
├── .yarnrc.yml
├── database.yml
├── Dockerfile
├── go.mod
├── go.sum
├── inflections.json
├── package.json
├── postcss.config.js
├── README.md
├── webpack.config.js
└── yarn.lock