Clack - Web Application Environment for Common Lisp. This finally looks really nice and lean - most Common Lisp web frameworks are just too big, too complicated. This looks much more pragmatic, a simple routing, a lean request and a function that reacts to it. One could play around with that, installation is trivial thanks to Quicklisp (I'm so glad that Quicklisp exists now, the asdf-install hassle was really annoying). In its approach, it reminds me a bit of Turbogear for Python - various existing libraries are bundled with Clack, so to speak a lean web best practices. There is already an application framework that also runs in the minimal environment, Caveman.