Librep is a shared library implementing a Lisp dialect that is lightweight, reasonably fast, and highly extensible. It contains an interpreter, byte-code compiler, and virtual machine. Applications may use the interpreter as an extension language, or it may be used for standalone scripts. Rep was originally inspired by Emacs Lisp. However one of the main deficiencies of elisp--the reliance on dynamic scope--has been removed. Also, rep only has a single namespace for symbols.
Sawfish (the window manager formerly known as Sawmill) is an extensible window manager using a Lisp-based extension language. All window decorations are configurable and all user-interface policy is controlled through the language. Its aim is to manage windows in the most flexible and attractive manner possible. As such it does not implement desktop backgrounds, application docks, or other things that may be achieved through separate applications. Sawfish is mostly GNOME-compliant; almost all configuration may be made through a graphical interface.
sawfish.wm.ext.pager is a C/Lisp extension that provides a functional desktop pager for the sawfish window manager. A pager is a map of your desktop. It shows not only the visible part of your desktop (the current viewport), but also the parts that extend beyond the sides of your screen. Also, if you have more than one workspace, the pager will follow you to where you are, or optionally show all workspaces at once. Of course you can select viewports and windows, and also move or raise/lower the latter.
gedit-plugins-extra is a huge, unofficial set of third-party plugins for gedit (2.13+) and some styles for GTKSourceView (2.0+). Plugins include advanced bookmarks, advanced editing, align, auto tab, browser preview, classbrowser, currentline, deletion, doc prop, edit shortcut, find in documents, latex, line spacing, python outline, reopen tabs, scratch tab, snap open, splitview2, todo, trailsave, and wordcompletion. Styles include aurora-borealis, babymate, blue-dream, chela, darkmate, dazzl, dessert, emacs, emacsdark, fluffy, textmate, tinge, and turbo.
gnome-run-dialog uses the same history as GNOME's one, but sorts it alphabetically. It also allows you to run a command as root, or in a terminal, or both. You can also clear the history or choose a file as an argument for the application. As soon as you start typing in the textentry, a completion will be shown, which shows every matching application in /usr/bin and /usr/sbin, which you can then select. It also allows you to pass environment variables to your application.
NScripts is a set of Nautilus scripts for several purposes, like changing the background and the splash image, copying and moving files (similar to Konqueror's context menu actions), creating and checking MD5 sums, creating a diff of two selected files, sending shortcuts to any place, creating menu entries from .desktop files, opening all selected files in GEdit, opening a terminal with the current directory as the working directory, and shredding files.
SSD (Sawfish Session Dialog) is a small and flexible wrapper for session commands. It is intended to be used with Sawfish, but does not require it. It can be configured to use any command for logout, reboot, shutdown, suspend, hibernate, and lock actions. Preset command definitions are available for: KDE4, GNOME2, XFCE4, MATE, and Razor-Qt. It is part of Sawfish-Extras (currently there's only SSD, but more is planned).
As of Sawfish 1.7.0 it's shipped with the WM itself. Also the included version is heavily improved compared to this one.