The name of the website that allows users to submit a purposed project with an estimated cost and then people could endorse the project and state how much they are willing to give?

Answer 1

These kind of mass-funding sites are becoming very popular nowadays, with video game artists like Double Fine receiving £3,000,000 ($4,789,500) from these mass funding sites.

This is how it works. A business, like Double Fine, posts their business proposal, their objectives, and their funding target onto a mass funding site. It's like pitching the idea. Then, normally through PayPal, people donate money to the cause.

So, to answer your question, for a good site check the link. That is the website that funded Double Fine.