HTML and CSS
The combination of HTML and CSS is virtually jedinným really combining to create a functioning website. Defacto every professional web site is created by these languages.
HTML (HyperText Markup Language) is a markup language for hypertext. These include language for creating pages in WWW (World Wide Web) that allows publication of documents on the Internet.
CSS or Cascading Style Sheets (Cascading Style Sheets) is a language designed for the display of pages written in languages of HTML, XML or XHTML. Allows you to create graphically advanced than websites such as using pure HTML.