priest:

http://www.gotwarcraft.com/guides/classguides/priest.php

warrior:
http://www.gotwarcraft.com/guides/classguides/warrior.php

rouge:

http://www.gotwarcraft.com/guides/classguides/rogue.php

http://roguebuilds.com/
 

shaman:

http://www.gotwarcraft.com/guides/shaman_guide.php

Hunter:
http://www.wowwiki.com/Hunter_builds

http://www.tentonhammer.com/node/26134

http://www.blizzardguides.com/wow_hunter_pet_guide.html

http://www.gotwarcraft.com/guides/classguides/hunter.php#level

warlock:

http://www.gotwarcraft.com/guides/classguides/warlock.php

Mage:

http://www.gotwarcraft.com/guides/classguides/mage.php
 

Death Knight:
http://www.gotwarcraft.com/guides/classguides/druid.php