My friend Igor Ješe who is an all around awesome guy recently wrote a new piece of commercial software called MockupData that allows you to create realistic sample data you can use to test your applications. Without further ado you can read the press release about MockupData here and newsletter announcement. If you have a need for such a tool I would highly recommend Igor’s software.
This is not Igor’s first product. Prior to MockupData he wrote a tool called Mockupscreens which let’s you create mockups easily.