Quicklisp
Quicklisp aims to make it easy to get started with a rich set of community-developed Common Lisp libraries.

It is currently (2013-01-08) available as a public beta.

Quicklisp is developed by Zach Beane, and released under an MIT-style license.

Resources:

For a list of libraries that may be installed via Quicklisp, see the Quicklisp releases page.