web2py

Everything in one package with no dependencies. Development, deployment, debugging, testing, database administration and maintenance of applications can be done via the provided web interface. web2py has no configuration files, requires no installation, can run off a USB drive. web2py uses Python for the Model, the Views and the Controllers, has a built-in ticketing system to manage errors, an internationalization engine, works with SQLite, PostgreSQL, MySQL, MSSQL, FireBird, Oracle, IBM DB2, Informix, Ingres, sybase and Google App Engine via a Database Abstraction Layer. web2py includes libraries to handle HTML/XML, RSS, ATOM, CSV, RTF, JSON, AJAX, XMLRPC, WIKI markup. Production ready, capable of upload/download streaming of very large files, and always backward compatible.