HTML5 templates

http://www.freewebtemplates.com/

 

http://www.opendesigns.org/website-templates/2/

 

http://www.1stwebdesigner.com/free-responsive-html-templates/

CSS file changes : http://sharepointpromag.com/sharepoint-development/sharepoint-branding-101-cascading-style-sheets

http://templated.co/

http://www.microsoftvirtualacademy.com/training-topics/html5

 

http://www.microsoftvirtualacademy.com/training-courses/introduction-to-asp-net-mvc