Duet is described as 'Project management and invoicing for freelancers and small businesses. DuetApp is a PHP application you can run on your server, VPS, or desktop/laptop' and is an app in the Business & Commerce category. There are more than 50 alternatives to Duet for a variety of platforms, including Online / Web-based, iPhone, Mac, Android and iPad. The best alternative is Trello, which is free. Other great apps like Duet are Asana (Freemium), Basecamp (Freemium), ClickUp (Freemium) and Zenkit (Freemium).
Award winning best FREE invoice maker app for small businesses! Unlimited invoice & customers. Organize your bookkeeping from anywhere. Keep track of all income, items, customers and export a PDF report of any page for easy accounting.
A system for managing projects and personnel. Service is based on versatile technologies such as Scrum and Kanban, which are used by Toyota, Microsoft, Nokia and many others. The system can be generally applied almost to any sphere.
Build better eCommerce & business applications with the open-source Scipio ERP framework. From Accounting to Warehouse Management: a long list of business applications is available to you and waiting to be customized.