I found this easter eggs on a french website, I didn't discover them. I'll try to post more easter eggs in the future.
Krull: Reference to the movie
http://n-picture.net/charly/eggs/282.jpg
http://dvdmg.com/krull.jpg
Hotel California: Reference to the song
http://n-picture.net/charly/eggs/283.jpg
Eagles - Hotel California Lyrics
Reference to the cow level in diablo: "Roi des vaches" = "King of cows"
http://n-picture.net/charly/eggs/288.jpg
Reference to Elvis: "Pas touche" = "Don't touch"
http://n-picture.net/charly/eggs/290.jpg
Reference to Averel in lucky luck: "Quand est-ce qu'on mange" = "When do we eat?"
http://n-picture.net/charly/eggs/291.jpg
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EDIT1:
Reference to matrix:
http://n-picture.net/charly/eggs/146.jpg
Reference to Austin powers:
http://n-picture.net/charly/eggs/167.jpg
Reference to Magellan:
http://n-picture.net/charly/eggs/172.jpg
Reference to musclor and his band:
http://n-picture.net/charly/eggs/180.jpg
les Maîtres de l'Univers
Reference to MacGyver:
http://n-picture.net/charly/eggs/183.jpg
Reference to Hulk Logan:
http://n-picture.net/charly/eggs/241.jpg
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EDIT2:
Reference to Lyndsay Davenport:
http://n-picture.net/charly/eggs/35.jpg
Reference to Mario and Luigin (easter eggs is present in hollywood's post but it's for the picture):
http://n-picture.net/charly/eggs/36.jpg
Reference to Lord of the Rings: Gandalf says "You shall not pass"
http://n-picture.net/charly/eggs/44.jpg
Reference to Excalibur:
http://n-picture.net/charly/eggs/251.jpg
Reference to Transformers:
http://n-picture.net/charly/eggs/257.jpg
Reference to Blizzard: (you have to inverse the name of the npc):
http://n-picture.net/charly/eggs/259.jpg
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EDIT3:
Reference to Cosmocats:
http://www.n-picture.net/charly/eggs/09.jpg
Cosmocats
Reference to Rio de Janeiro:
http://www.n-picture.net/charly/eggs/11.jpg
http://www.chez-fred.net/bossa/commo...vado_intro.jpg
Reference to the Blair Witch Project:
http://www.n-picture.net/charly/eggs/12.jpg
http://www.kinoweb.de/film99/BlairWi...ix/logo200.gif
Reference to Frank Lloyd Wright:
http://www.n-picture.net/charly/eggs/21.jpg
Frank Lloyd Wright - Wikipedia, the free encyclopedia
Reference to Captain Lighfoot (oups, it's not a NPC):
http://www.n-picture.net/charly/eggs/46.jpg
Captain Lighfoot (1955)