CopyPaste Pro is a utility that greatly enhances the clipboard functionality of the Mac OS. The program not only lets you maintain multiple clipboard items ("clips") for easy pasting across all applications, but it also keeps a history of copied clips and stores custom archives for static subsets of clips that you use frequently.
Like other good efficiency-enhancing apps, CopyPaste Pro provides a lot of different ways to access its deep functionality, with plug-ins for the menu bar and contextual menus, a comprehensive complement of hot keys and drop-down menus, and mouse-and-key combinations for pulling up your clip history and archives in a clip browser that looks much like the Mac's application switcher. CopyPaste Pro also comes with a text editor (named Bean) for instantly editing your clips. This narrow-purpose utility may be too pricey for casual users, but for anyone who does a lot of copying and pasting, it represents a huge improvement over the Mac's humble built-in clipboard.