Despite the recent authentication bug that opened all Dropbox cloud storage accounts and made them accessible without a password, Dropbox was iCloud before iCloud existed. The 4-year-old company targets consumers and SMBs with its cloud storage service that lets users save music, documents, videos and other content so it can be accessed from any Internet-enabled device. Dropbox offers the first 2 GB for free and a paid Pro account for up to 100 GB. A referral program gives users more space if they bring aboard new users. Dropbox also pays close attention to synchronization, letting users swap files and folders in the cloud.
Dropbox, which boasts 25 million users, works with Apple iPhone and iPad, Google Android and BlackBerry devices for mobile users and on Windows, Mac and Linux operating systems. It also integrates with a host of third-party app and offers developers the ability to integrate Dropbox into their service.