Yes, cl-cont by our very own Slava "coffeemug" Akhmechet. Unfortunately, a recent site rebuild at common-lisp.net seems to have left the project page blank; no

Yes, cl-cont by our very own Slava "coffeemug" Akhmechet. Unfortunately, a recent site rebuild at common-lisp.net seems to have left the project page blank; nor do I see a cl-cont repo on Slava's Github page. It's Quicklisp-installable, though.