Also works with 3rd party apps and add-ons:

Courier

With Courier you can Dropmark from your Mac and simultaneously upload to Facebook, Flickr, Tumblr, Vimeo, YouTube, FTP, and more.

Feeds

Feeds keeps you up-to-date with your Dropmark activity, notifying you of incoming invites, items from collaborators, even quickly preview items right from your Mac menu bar.

iPhoto

Drag and drop photos directly from your iPhoto library, and automatically sync and backup your Dropmark photo collections.

iTunes

Upload a few audio files and you just created a dead simple playlist and podcast. Subscribe directly from iTunes, and new files are automatically downloaded.

E-mail PRO

Upload items on the go, or from your favorite mobile apps using e-mail. Attach photos, files, links, or text and Dropmark will handle it from there.

RSS

Every Dropmark collection has a built-in RSS feed. Subscribe and get notified with automatic previews when new items have been added.

Extensions & bookmarklets

Dropmark web content right from your favorite browser with native browser extensions and bookmarklets for Chrome, Safari, Firefox, and Internet Explorer.

Developer API

Get nerdy with our RESTful JSON & XML API and access your data however you want. Build your own apps, widgets, and mashups.