Web2py is a free and open-source web application framework written Python. With Web2py, developers can build dynamic applications with ease. The framework ships with "batteries included" for fast multi-threaded web server, SQL database and web-based interface. Web2py also ships with a web-based IDE that can be used to manage your application using your browser. A single instance can also run multiple web applications using different databases. Web2py free of charge under the LGPLv3 License.