The aim of the Grosvenor Project is to develop a unique ‘Self Service e-Store’ facility for a website building platform. The current platform is an Internet-based website design and hosting service, targeted at micro and small businesses which have no capability and experience of producing websites (within the UK, 60% of SMEs do not have a website). The next stage is to make it easy to create websites of significantly increased sophistication through integration with best-of-breed third party web-based services e.g. eCommerce, eMarketing, mobile payments, etc. The proposed approach is to create a thriving e-Store with a wide range of applications and widgets to provide the integrations between the third party services and the websites developed and deployed using the platform. Therefore, companies who traditionally eschew the use of the web as a trading opportunity, or who cannot afford the creation of a website to provide new revenue streams, can easily and quickly create and deploy such a website without requiring any detailed technical expertise over and above using a web browser to manipulate drag-and-drop based design templates. The key objectives are to: a) identify the best approach for creating, managing and using an e-Store that contains applications and widgets to be used to create innovative websites based upon the builder platform; b) define and demonstrate the security framework to underpin the e-Store to ensure that malicious applications and widgets cannot cause broader service failure or permit data integrity and availability violations; c) demonstrate the capabilities of the new software development kit to enable the creation of the applications and widgets that will enable simple integration with a broad range of third party services; and d) identify the most effective way to annotate and manage the availability of the new applications and widgets to ensure they can be quickly and effectively used by a non-technical website designer.