(CNN) -- Susie Levitt's and Katie Shea's feet had had enough. Walking around Manhattan sidewalks between classes in their high heels was getting unbearable. Katie Shea and Susie Levitt,  founders of "CitiSoles," said walking around Manhattan in high heels was painful. Tal Raviv felt frustrated. While studying in Hong Kong in 2007, he found that adjusting to a new city was hard enough. Even more aggravating was trying to  connect with friends on Facebook whose names were common. Jaun Calle and Adam Berlin were bored. Watching college football on television isn't as exciting as being there in person, they thought.
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Susie Levitt and Katie Shea created a foldable-shoe company called "CitiSoles"
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Tal Raviv co-founded "DropCard," a new take on the business card
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Juan Calle and Adam Berlin created "SEC Excursions," a travel agency
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"There is no better time" to start a business, an entrepreneur expert says
Her partner, @placeholder, double-majored in finance and marketing and graduated in May.