The SAFE Stack

The SAFE stack is functional programming's answer to full-stack web development, and it's entirely in F#. Saturn provides the server framework with an elegant computation expression API, Azure hosts it all in Microsoft's cloud, Fable compiles your F# to JavaScript (because why would you write JavaScript when you could write F# instead?), and Elmish brings the Elm architecture to your frontend. It's type-safe from database to DOM, which means if it compiles, it probably works. The F# community is small but fierce, and SAFE is their crown jewel.