Ditto is a feature-rich, customizable extension to the standard copy-paste mechanism. The program saves each copied item to a dynamic list, allowing access to anything copied or cut. You can save any type of information that can be put on the standard Windows clipboard and preview in before pasting.
Additionally, the program can communicate with other computers over a network to keep clipboards in sync.
Alternatively, Ditto Portable is also available in the PortableApps format.