If you're a Macromedia Flash designer, you'll love the music4flash.com website. This site offers the music, sounds and loops for use in your Flash movies. Music4Flash offers you a complete catalog of high-quality royalty-free music ready to plug into your movie which will make your movie stand out even more.
This is the Macromedia's Official Flash Page. Here you can find the download page for free trial of Flash software as well as purchase information. It also provides a wealth of Flash-related resources such as tutorials, showcase, user support center, FAQs and more.