"We are working to get the app in the hands of Android users as soon as possible," says lead developer Christine Corbett Moran (an astrophysicist with a double-major Physics/CS degree from MIT, who develops apps in her copious spare time).
Jeffers, a creative manager for a small media company that develops apps, is about to rent a flat with Carol, a freelance illustrator, until they can get a mortgage.
"It's basically Facebook's to lose", says Mark Pincus, the chief executive of Zynga, a social-gaming firm that develops apps to run on the service.Not so long ago, exactly the same thing might have been said of MySpace.
As social media and mobile technology have expanded in scope over the last five years, the top 10 list has shifted to include sites like Conduit, above, which develops apps and custom toolbars, and Six Apart, which makes blogging software.
"Conceivably, an app with access to location data could put together a history of where the user has been based on photo location," said David E. Chen, co-founder of Curio, a company that develops apps for iOS, Apple's mobile operating system.
Gupta previously headed up ConsenSys, a company that develops apps and tools based on Ethereum.
