A list of most (recommended) popular go libraries:
[Gin] is a HTTP web framework written in Go (Golang). It features a Martini-like API with much better performance -- up to 40 times faster. If you need smashing performance, get yourself some Gin. https://gin-gonic.github.io/gin/ (4,455 stars)
[Logrus] is a Structured, pluggable logging for Go.
[Gorilla] WebSocket library which provides a complete WebSocket implementation. https://github.com/gorilla/websocket (1,499 stars)
[Negroni] - Idiomatic HTTP Middleware for Golang https://github.com/codegangsta/negroni (3,044 stars)
[Redigo] - library which provides an interface to Redis. https://github.com/garyburd/redigo (1,708 stars)