Redsys offers quality payment system services; secure, flexible, innovative, efficient and sustainable in time. As a leading national and international reference, Redsys has created a variety of standards and technological-operational solutions for financial institutions and other major industry players, both in Spain, Europe and Latin America.
Please find more informartion about how to install plugins here.
The plugin is provided absolutely for free and includes source code. Find the project Github repository here.
UPDATE: nopCommerce team doesn't plan to upgrade this plugin to the latest version. Our community is more than welcome to continue development of the plugin. Please feel free to use our source code.