The document provides links to various data flow diagram templates for systems such as a student grading system, restaurant order system, patient information system, video rental system, payroll system, online shopping system, inventory management system, communication system, ATM, library management system, hospital management system, online shopping cart system, ticket reservation system, hotel reservation system, online e-learning system, and SaaS product. It encourages visiting the listed websites for more data flow diagram examples and templates to create diagrams for various uses.