go-chi/chi: lightweight, idiomatic and composable router for building Go HTTP services

Golang の HTTP Routing ライブラリ。REST な Routing が作り易い様に見える

mash/go-limiter: A HTTP server middleware for limiting/throttling requests using Redis INCR.

HTTP Server 用の Rate Limit or Throttling を行える Middlware 。Redis を使ってるっぽい