Shareware is a marketing method for computer software in which the software can be obtained by a user, often by downloading from the Internet or on magazine cover-disks free of charge to try out a program before buying the full version of that program. If the "tryout" program is already the full version, it is available for a short amount of time, or it does not have updates, help, and other extras that buying the added programs has. Shareware has also been known as "try before you buy". A shareware program is accompanied by a request for payment, and the software's distribution license often requires such a payment. (from Wikipedia)