* CL: (cl). Partial Common Lisp support for Emacs Lisp.
* Dired-X: (dired-x). Dired Extra Features.
* Ediff: (ediff). A visual interface for comparing and merging programs.
-* Emacs-Xtra: (emacs-xtra). Specialized Emacs features.
* Org Mode: (org). Outline-based notes management and organizer.
* PCL-CVS: (pcl-cvs). Emacs front-end to CVS.
* Speedbar: (speedbar). File/Tag summarizing utility.