Add real-time offers and behavioral targeting capabilities
Not sure which category is more appropriate, but I'm so thrilled with their solution that I had to post it also in Plugins.

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Tau stores commented
Rupali - I've tested you solution - it's nice but it's a rule based solution - nothing like Commerce Sciences automated solution. Thanks for sharing though. http://CommerceSciences.com
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Rupali commented
You can have a look at the following plugin, Smart Offers : http://www.storeapps.org/product/smart-offers/