Clojure HTTP server abstraction
The Pedestal Server-side Libraries
Figwheel builds your ClojureScript code and hot loads it into the browser as you are coding!
Realtime web comms for Clojure/Script
Ring plugin for Leiningen
Reloaded components à la carte
Asynchronous web toolkit for clojure built on top of Ratpack / Netty
Clojure web server benchmarks