* Standard library for a lot of things.

* https://github.com/go-chi/chi is pretty good. I have a need for a lot of custom middlewares, so I need something more fleshed out than net/http.

* All config files are written in TOML: https://github.com/BurntSushi/toml

* https://github.com/gocql/gocql for all Cassandra needs.

* Development work is done in Docker so everyone has a consistent env.

That's all, I tend to dislike overarching frameworks. Smaller libraries work better for me.