99designs | Matt Mickiewicz, 27

San Francisco and Melbourne

Provides crowdsourced design services.

AdParlor | Kristaps Ronka, 24; Hussein Fazal, 29

Toronto

Creates and manages ad campaigns on Facebook.

Advantage Media Group | Adam Witty, 29

Charleston, South Carolina

Publisher of business books and magazines.

AnchorFree | Eugene Malobrodsky, 29; David Gorodyansky, 29

San Francisco

Makes software that provides secure Web access and thwarts government censors.

Birchbox | Hayley Barna, 27; Katia Beauchamp, 28

New York City

Subscription service that gives members monthly deliveries of high-end beauty samples.

Drop the Chalk | Jen Schnidman Medbery, 27

New Orleans

Makes software to track student academic performance and behavior.

Dropbox | Drew Houston, 28; Arash Ferdowsi, 25

San Francisco

Provides cloud-based storage for 25 million users.

evoJets | Christopher Kelly, 28; Adriann Warner, 28

Aspen, Colorado

On-Demand priviate jet charter service.

Extreme Entrepreneurship Tour | Michael Simmons, 29; Sheena Lindahl, 28; Arel Moodie, 27

New York City

Stages entrepreneurship conferences at colleges.

Foodspotting | Ted Grubb, 29; Soraya Darabi, 27; Alexa Andrzejewski, 27

New York City and San Francisco

Restaurant recommendation app based on social sharing of food photos.

Freshii | Matthew Corrin, 29

Chicago

Soup-and-salad restaurant chain, with 50 outlets worldwide.

Gemvara | Matt Lauzon, 25

Lexington, Massachusetts

Online custom-jewelry retailer

Gianna Fair Trade | Gianna Driver, 28

San Francisco

Sells fashion and home accessories made by a worldwide network of women living in urban slums and impoverished villages.

Grasshopper | Siamak Taghaddos, 29; David Hauser, 29

Boston

Provides virtual phone systems to small businesses.

GroupMe | Steve Martocci, 29; Jared Hecht, 24

New York City

Provides group-based text-messaging services.

Hipmunk | Steve Huffman, 27; Adam Goldstein, 23

San Francisco

Clean and simple flight and hotel search site.

Ignighter | Kevin Owocki, 26; Dan Osit, 29; Adam Sachs, 28

Delhi, India, and New York City

Group dating website with more than 2 million users in India.

inDinero | Andy Su, 20; Jessica Mah, 21

San Francisco

Online money-management tools for small businesses.

Instagram | Mike Krieger, 25; Kevin Systrom, 27

San Francisco

Photo-sharing app with sophisticated image filters.

JackThreads | Jason Ross, 29

Cleveland

Online members-only shopping club for men.

Nom Nom Truck | Jennifer Green, 27; Misa Chien, 25

Los Angeles

A food truck that sells Vietnamese banh-mi sandwiches.

Kairos Society | Ankur Jain, 21

Philadelphia

Not-for-profit organization for entrepreneurial college students.

SCVNGR/LevelUp | Seth Priebatsch, 22

Boston

A location-aware app and a site that encourages loyalty to local businesses through discounts.

Onswipe | Andres Barreto, 24; Jason Baptiste, 25

New York City

Offers a Web publishing platform that allows users to easily migrate their content to touch-enabled devices.

Quora | Adam D'Angelo, 26; Charlie Cheever, 29

San Francisco

Crowd-based question-and-answer website.

The Refine Method | Brynn Jinnett, 27

New York City

A boutique fitness studio.

Sentry Centers | Christopher Kelly, 28; Ryan Simonetti, 29

New York City

Provides conference and meeting spaces to corporate clients.

The Shirt by Rochelle Behrens | Rochelle Behrens, 28

Washington, D.C.

Designs and manufactures women's shirts with a hidden placket that eliminates gaps.

Solben | Daniel Gomez Iniguez, 20

Monterrey, Mexico

Creates alternative energy products.

Unigo | Jordan Goldman, 27

New York City

Website featuring student-generated information on hundreds of U.S. colleges and universities.