Free and open source full-stack enterprise framework for agile development of fast, scalable, secure and portable database-driven web- based applications. Written and programmable in Python. Click http://web2py.com/demo_admin for an interactive online demo of the web based IDE. New features: - better support for legacy databases. - easier upgrades - plugins and components system - support for GAE *IN* operator - all fields now have default validators - support for virtual computed fields - distributed transactions support extended to mysql, firebird and postgresql - always backward compatible