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Slide

Slide

San Francisco
Social networking
CEO: Max Levchin, 33

Slide helps put the fun in online applications. Its first product, available on social networks like Bebo, MySpace, and Orkut, allows users to upload, decorate, and share photos as slide shows. It's also behind two of the most popular widgets on Facebook: Top Friends, which lets users install quick links to their virtual buddies, and FunWall, an interactive billboard that lets users share videos, posters, and fun messages. Slide is perhaps best known for SuperPoke!, an application offering virtual hijinks like "sheep throwing" and "trout slap."