Where i can see different types of innovative poster designs?

Answer:
Since you're asking your question in the "Advertising & Marketing" section I assume you mean "advertising posters".

Here are just a few sites -

http://www.globaldesigns.com/posters.htm.
http://gpn.unl.edu/cml/cml_product.asp?c.
http://www.wisconsinhistory.org/artofthe.
http://www.art.com/asp/display-asp/_/id-.
http://webpages.marshall.edu/~bennett7/g.
http://www.charlesmichaelgallery.com/vin.
http://www.francofolie.com/
http://www.poster.com.pl/poster-6.htm.
http://www.chisholm-poster.com/.
http://www.uprr.com/aboutup/photos/adver.
http://www.vintageposterworks.com/. Other Questions and Answers:

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