Filecamp

Collaborate -- The Online Proofing tool simplifies the complicated process of working on a project with multiple people and collecting everybody's opinions and feedback. File sharing is made easy with public download and upload folders that other users can access by a URL. Organize -- The simple user and asset management tools, gives you control over who can access and edit what. And lets you organize your assets in a user friendly interface. Customize -- The service provides an easy way to brand your company, by customizing the layout to match your and your customers visuel identity.

Limitations:

14-day trial