First of all, thank you for your continued support over the years to NextGen-DF. We have now developed a new web tool that is a significant upgrade of NextGen-DF. The new tool is called U-Design and is available at

Please register an account, which is free at the moment. The U-Design has a superior user interface, more functionalities, more design choices, and much-improved visualization. Please feel free to contact us at nextgendf@gmail.com if you have any question.