FlashDen is a site where you can buy and sell items to use in your creative projects.
There are four types of items available on the site: Adobe Flash files, Audio loops and effects, Video loops and Pixel fonts.
To use the site you create an account and then deposit cash to your account to go shopping with. You then browse about and using your cash you purchase and download items. You can then use those items in your own projects or client projects. The main thing you cannot do with items you purchase is resell or redistribute them.
You can also make money on FlashDen by selling your own files or by referring new members. Click on Make Money in the menu to learn more.