Mac OS X: Sharing a file with Dropbox isn't hard, but it can be a little tedious to open the public folder, drag the file in, and then right-click to copy the link. Bloodrop automates this process. All you have to do is drag a file onto its icon -- whether you keep it in the dock or elsewhere -- and it'll put a public share link in the clipboard.
Before you can start using Bloodrop you have to set it up. To do this, just run the application once and enter your Dropbox ID when prompted. It's important to note that your Dropbox ID is not the email you use to sign in. It's actually a number associated with your account. It's easy to find this number, fortunately, by just creating a public share link the old-fashioned way. When you have the URL it should start with this:
The number following the u/ is your ID. Give that to Bloodrop, then specify a folder inside your Dropbox's Public folder and you'll be ready to go. From there you don't have to ever open the application again unless you want to repeat the setup. To use it, just drag a file onto its icon and you'll have a public link in your clipboard in seconds.