Google Hacks enables you to filter Google search by selecting exactly what you're looking for: applications, videos, books, song lyrics, torrents and other file types and applications.
Simply check the appropriate filter and the desired format if applicable, and results will open up in your default browser. This application simply takes advantage of Google's modifiers so that you don't have to type them by yourself, but it would be even better if you could launch the search by pressing "Enter" instead of having to click on the program's button.