The sites created will use some or all of the following 

HTML
HTML stands for Hyper-Text Markup Language, it describes the contents and appearance of each element on a Web page, such as a paragraph of text, a table, or an image, and states how they appear to the user. The majority of sites will be based around HTML. 

CSS
CSS stands for Cascading Style Sheets, it is used alongside HTML to further control the appearance of page elements. Using CSS it is possible to define various element styles consistantly throughout a web site.

JavaScript
This is a coding language with a wide range of uses, from rollovers and form validation to shopping carts.

ASP
ASP or Active Server Pages is most often used in sites that need to connect with a database. For example, e-commerce sites that store products in a database.

Flash
Flash can be used to create navigation controls, animated logos, animations with synchronized sound, or complete web sites. 

Graphics
Graphics play a part in most sites, from layouts to illustrations. They can be built from scratch or be created from manipulated photographs. Graphics may be static (non moving) or animated.  

Example