ThemesTent Framework is a front-end starter template for rapid front-end prototyping. The project working towards it's beta release. That's why it required a invitation page for all the front-end developers around the work so that they can subscribe to get the release date.
The invitation page was design with 'Mobile First Approach' and finally converted into Responsive Site using the ThemesTent Framework. Using SASS/COMPASS with retina display mixin.