Canva makes graphic design amazingly simple for everyone, by bringing together a drag-and-drop design tool with a library of more than 1 million stock photographs, graphic elements and fonts.
Canva is an online, graphics-tool service. It enables people to create beautiful designs in a fast, easy, and inexpensive way.
One of the design categories is Kindle ebook covers because I know what a challenge and expense this is for self-published authors. Here is a collection of covers: http://www.pinterest.com/canva/canva-layouts-kindle-book-covers/
People can create from scratch or use Canva designs as a starting point. Canva is free unless people use a stock photo -- then the charge is $1/photo.
This video explains how to create Kindle covers with Canva:
If you like what Canva does, please tell people who will want to create Kindle covers or need to create graphics for Facebook, Twitter, Google+, Pinterest, eBay, Etsy, LinkedIn, blogs, and presentations.