The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Claybrook Software:
Our first application, Crazy Kitties, is available exclusively for the iPhone and iPod touch. Crazy Kitties is an incredibly cute sound emulator that allows you to simulate the presence of kittens in any environment.In Crazy Kitties, you have a choice of six cats, and by touching each cat, you are presented with a photo of that cat meowing, as well as a small audio clip of the meow. Since all of the high quality photos and audio clips were captured by Claybrook Software or our affiliates, the photos and audio create a realistic experience.Crazy Kitties is a fantastic way to keep yourself entertained while passing the time, and includes support for Facebook and Twitter, allowing users to post status updates.*With the release of version 2.0 users will have even more of a reason to simulate kitties on a regular basis. An added feature will allow users to submit photos and sounds of their own cats for a chance to be featured in the Crazy Kitties' User-Submitted Kitty of the Month section. Keep checking back, the update will be available in the coming weeks.*