mpc
Monadic Parser Combinators for Common Lisp. MPC tries to be simple and practical while being powerful, well documented and fairly performant. A friendly fork of Drew Crampsies _Smug_ library.
$ area51 add mpcCopyUsage
;; area51 add updates your .asd automatically.
;; Use the package in your code:
(in-package :my-project)
(mpc:some-function ...)