Kickstarter and Indiegogo are great platforms for people to fund good ideas or projects, but navigating those sites to find the great projects amidst the thousands of others isn't easy. So here's Outgrow.me, which shows you only the successful products/projects you can pre-order or buy now.
Besides filtering the items between ones that'll ship now or when the product is available, you can browse by categories, including under $US25 and "everything but Apple".
It doesn't, however, offer up the projects that still need funding -- ones that might give you more incentive to invest in if you pledge a certain amount. For those, you'll need to find and vet the project yourself.
However, for the projects that are successful, Outgrow.me makes looking for the latest innovations really easy.