GNOME Do allows you to quickly search for many items present in your GNOME desktop environment (applications, Evolution contacts, Firefox bookmarks, files, artists and albums in Rhythmbox, Pidgin buddies) and perform commonly used actions on those objects (Run, Open, Email, Chat, Play, etc.).
Describes how to create an extension for Enso launcher which is better than Quicksilver and provides a framework for writing more plugins. Uses xml-rpc.net library to call Enso interface