Clipboard Master stores all of the copied text. After installing this application, whenever you copy anything, the application will store it. Even if you shutdown the computer or restart it, all copied data will be retained by the application.
The application comes with two interfaces: one resides at the menu bar, where you could access the most recently copied text snippets. The application also comes with Search functionality; using this, you can search for any required data, and get the content that was copied even months earlier. You can even modify and update copied data within the application.