A crowdfunding machine. With a slight bias towards socially conscious research, educational and artistic endeavours, RocketHub is a little different in style and purpose than the wildly popular Kickstarter. It includes, in its LaunchPad, support for the process of working an idea up to a full-blown project through (optional) collaboration with people who know about such things like marketers etc. Or you can just go straight for the FuelPad and pitch your project. Either way, like most such ventures, the site earns money by creaming a little off the top, but it is free to start a project.
Address of the bookmark: http://www.rockethub.com/