Freeware is copyrighted computer software which is made available for use free of charge, for an unlimited time, as opposed to shareware where the user is required to pay (e.g. after some trial period or for additional functionality). Authors of freeware often want to "give something to the community", but also want credit for their software and to retain control of its future development. It should be noted that freeware is not the same as Free Software.
Shareware is a marketing method for computer software. Shareware software is typically obtained free of charge, often by downloading from the Internet or on magazine cover-disks. A user tries out the program, and thus 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.
FTP or File Transfer Protocol is used to transfer data from one computer to another over the Internet, or through a network.