CL-Librarian aims to be a manager for Common Lisp libraries, focused on libraries updated dynamically by version control systems and targeted at power users. It handles downloading such libraries, and keeping them up-to-date. It is currently a work in progress, still far from complete, but already usable.
Source code, available on terms of BSD license without advertisement clause, is kept in a darcs repository at http://common-lisp.net/project/cl-librarian/darcs/cl-librarian/ (browse). Documentation is kept in the README file, and project is discussed on the cl-librarian-devel mailing list.