Planck is a stand-alone ClojureScript REPL for macOS and Linux.

Planck launches instantly and is useful for scripting.

You can run Clojure-idiomatic scripts with Planck:

(require '[planck.core :refer [line-seq with-open]]
         '[ :as io]
         '[ :as shell])

(with-open [rdr (io/reader "input.txt")]
  (doseq [line (line-seq rdr)]
    (println (count line))))

(shell/sh "say" "done")

Get it: On macOS brew install planck, on Ubuntu install using apt-get.

Read the Planck User Guide or browse the Planck SDK.

Planck is free and open source.