Leiningen Swank Plugin
This plugin lets you launch a swank server via Leiningen. Simply add [leiningen/lein-swank "1.0.0"] to your :dev-dependencies in project.clj and run "lein swank" to start the server. Then from Emacs run M-x slime-connect to connect to your project.
You will need slime and slime-repl (but not swank-clojure) installed from ELPA for this to work.
Due to a bug in contrib's build, there may be problems using it along with projects that use Clojure 1.0.