Courier for Mac is a file sharing (mostly for photo and video uploading) application that allows you to send files to multiple destinations at once, making it easy to share things like post pictures to Facebook and Flickr at the same time!! No more two and three windows open, upload all your files with Courier.
Courier works with Facebook, Flickr, YouTube, Ember, Amazon S3, and Vimeo with more services coming soon. Realmac will also be offering a plug-in API so that 3rd party developers can offer their own service plug-ins.