i need a simple project managment software for my website. something similar to basecamp, but no where near as complex.

its for a sign shop, and it would need the ability to upload files from a customers side, ie such as company logo, etc, as well as colaborate back and fort on the project, instead of emailing stuff back and forth, and be able to upload proofs for the customer to review and make comments.

something everyone could see and use in the company if there was ever a need to go back and look.

any ideas here? thanks!