If there's a red-headed stepchild of the Windows feature set, it's the right-click context menus. It seems like few users ever bother with them--perhaps because they don't know they're there, but more likely because they don't include the features users want--like, say, Copy To and Move To commands for files and folders, and shortcuts to the Control Panel or Task Manager on the Desktop.
With Right-Click Extender, you can add those and other handy shortcuts to Windows' context menus. The utility divides its options into four main headings: File/Folder, Desktop, Drives, and MyComputer--all indicating which set of right-click menus you're modifying. Within File/Folder, for example, you can add things like Administrator Command Prompt, Open with Notepad, and the aforementioned Copy To/Move To. Desktop options are mostly shortcuts to commonly used programs and functions, like Device Manager, Paint, and Hibernate PC. For many of these additions, you have the option of making them appear only when you hold down Shift while right-clicking--great if you want to make them "secret" menus that stay hidden to other users.