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.
Phonetic Alphabet Viewer is a free application for iPhone and iPod touch which will allow you to type in characters and instantly see what they are called in the phonetic alphabet. This is a handy little application to have if you are memorizing the alphabet, or if you frequently forget character names and need a quick reminder.