Wikipedia
Droplr
Droplr is an online file-sharing service that allows users to upload files from their PC, Mac and iPhone. The uploaded files can be accessed on any PC, Mac and iPhone with an internet connection by logging in at the website, entering the URL for the file or via the applications for available.
On January 3, 2014 Droplr announced via a blog post that they would be ending free plans and transitioning to a paid-only service. An announcement followed on January 8, 2014 announcing new pricing plans and a referral program that enables paying users to 'earn' a free Droplr account for life by referring 10 other paying users.