A few months ago, Droplr for iPhone was removed from the App Store because it was incompatible with version 2.0 of the web-based file-sharing service. Thankfully, the official iPhone companion app is back and includes support for Droplr 2.0. Droplr for iPhone, which allows for you to easily share images, documents, files, and links on the go, requires iOS 5.0 or later and is compatible with the iPhone 3GS, iPhone 4, iPhone 4S, and third- and fourth-generation iPod touch. Best of all, it’s free. Do you use Droplr?