Design, development, maintenance and update of computer software; providing temporary use of non-downloadable software and computer software applications for managing, locating, activating and revoking authentication and digital credentials of near field communication (NFC) devices; design, development, maintenance and update of computer application software for mobile digital devices; design, development, maintenance and update of downloadable computer programs and computer application software for mobile phones and other digital devices that allows users to access coupons, vouchers, voucher codes, rebates, price-comparison information, product reviews, links to the retail websites of others, and discount information; design, development, maintenance and update of downloadable computer programs and computer application software that allows users to access sales promotion offers and obtain monetary rewards that can be credited to accounts via a cash-back system; application service provider (ASP) services, namely, software for providing consumers with information regarding discounts, vouchers, and special offers for the goods and services of others; application software provider services (ASP) featuring software for receiving, transmitting and displaying vouchers, coupons, voucher codes, special offers, reviews, product information, price comparison information, links to websites, and receiving and transmitting data for the purchase of goods and services; data encryption and decryption of financial information; data encryption and decryption services