Popular Social Bookmarking Websites of 2021

• DuckDuckGo: A private search engine that also serves as a social bookmarking platform, allowing users to add links and notes to articles
• Nordstrom: An e-commerce website that allows users to create and save bookmarks, making it easy to access products and shopping lists
• Amazon: A popular online retailer that enables users to bookmark books, movies, music, and more for later reference

Notable Social Bookmarking Sites of 2021

• Bibliotek: A social bookmarking platform designed specifically for libraries and bookstores, allowing users to add notes and tags to books
• Khan Academy: An online learning platform that also features a social bookmarking feature, enabling users to save study materials and resources for later reference