PastePerfect is free clipboard utility for Windows that completely integrates with the desktop so that all the text you copy goes directly through this tool.
Beyond the ability to copy various texts, this tool comes with more options. It has a unique utility for creating collections, with which you can save complete forms or username/password pairs for use as a combination whenever you want. You can also save copied text as files to recover them later.
If you often use copy and paste, if you try PastePerfect you will for sure wonder how you have ever worked without it.
It incorporates a displayed ad on the text selection interface.