URL Droplet is a great Webapp service that has been designed to make it even easier to download files to your Dropbox account simply by dropping in a URL to the file you would like to download. You can then let it download at your leisure to be access later.
Once initiated the file download process places the file in your main Drop directory, rather than to one of your shared folders, which would allow everyone to then view your file.
To enable URL Droplet to be able to do this it does need access to your DropBox account. But if your not happy with your password and user name in the hands of a Webapp you could always create a secondary account just for files, which can then be transferred by you to your master account at a later date, give the URL Droplet Webapp a go now.
Source : Lifehacker