Social Bookmarks Supercharged - X-Cart Mod - Version 3.1 Social Bookmarks Supercharged (120+) - X-Cart Mod is unique solution which will let your customers to bookmark your site: any your product, category or page into social favorites / bookmarking services. Social bookmarking sites are a popular way to store, classify, share and search links. In a social bookmarking system, users store lists of Internet resources, which they find useful.