There are many.
html/css
.net
php
asp
cold fusion
and many more
Programs used could also be many:
DreamWeaver
Photoshop
Illustrator
Flex
Flash
various Microsoft products
Please know that there is a difference between "designing" web pages and "programming" them. You can "design" a web page in Photoshop or Illustrator which gives it a look only. Its just a big picture of what it will look like. But you have to write code behind it to make it functional online and that is where the programming comes into play. That is the developing part of doing a website. You design it, and then you develop it and make it live online.
The Art of Computer Game Design has 476 pages.
Do Good Design has 192 pages.
Design Patterns has 395 pages.
How to Design Programs has 720 pages.
The Prometheus Design has 190 pages.
Distillation Design has 710 pages.
The language used to produce www pages is HyperText Markup Language or HTML.
A Demon Of Our Own Design has 288 pages.
The Zen of CSS Design has 304 pages.
Game Design Workshop has 496 pages.
A Pattern Language has 1171 pages.
The Language of Goldfish has 179 pages.