Rajorshi's website provides a stable codebase to start with. Some portions of this website is shamelessly taken from his site. Thanks for the help.
Bluerobot's Layout Reservoir provides some excellent easy-to-use CSS layouts. Thanks for creating them.
AListapart provides all you need to know about CSS. This is a broad knowledge-base having some excellent CSS related tutorials
w3cschools provides some excellent beginner level tutorials to help you during your web development.
