Frameworks and libraries I saw but didn't try:
- https://github.com/ant0ine/go-json-rest
- https://github.com/julienschmidt/httprouter
- https://github.com/kataras/iris - positioning as fast, gin-like
- https://github.com/labstack/echo - positioning as fast
- https://github.com/paulbellamy/mango - rack-like