Discovered Pages
[Discover] GetSignOff - Present. Refine. Getsignoff for web designers to manage client feedback http://www.getsignoff.com/
(design tools webdesign signoff) 
[Discover] Getting client sign-off | And all that Malarkey http://www.stuffandnonsense.co.uk/archives/getting_client_sign-off.html (design signoff contract webdesign)
Submitted Pages
[Discover] Apollo - easy online image proofing http://www.useapollo.com/
(design graphic designers collaborative)