Droplr is a file and link sharing app for Mac OS X. Available from the App Store and many download sites, Droplr installs easily and requires an account on the Droplr servers to operate. The basic Droplr service is free, and there is a Pro service, with more bandwidth, available for an additional cost.
Using Droplr is easy. You drag anything onto the Droplr menu bar icon or use the keyboard shortcut; whatever you selected is automatically uploaded to a remote server, and the remote URL is returned to you. You can then share the URL with others through email, social media, IM, or any other means. While files are likely to be the most often shared items, we ended up using it for smaller things like notes and programming code just as often as files and screen captures. The upload process is fast. The interface gives you control over how things are shared and offers a history of uploaded items. The publishers are releasing plug-ins for many standard apps, too, such as Photoshop and Twitter.
Droplr worked well in our tests. The pop-up nag screen to upgrade to the Pro version was annoying, but the basic service will suit many people's needs. Droplr didn't cause any problems in the time we used it, and may become a standard app for many who do a lot of sharing.