ProjectHuddle - Get design feedback and client approval using WordPress.
Savahapp - The all-in-one design sharing, collaboration, workflow and app prototyping platform
Design Business - Database of design agencies, news, and useful materials.
Invision - Prototyping and collaboration for design teams
Flatsies - Flatsies is a tool for designers to share their concepts with clients in a simple and elegant way.
Conceptzilla - Get competitive design for a fraction of the industry cost