From Fedora Project Wiki
Choose your Fedora 21 Alpha Prerelease Product
What would you like to accomplish with Fedora? Are you looking for a server platform to host applications and infrastructure services? Are you looking for a powerful desktop workstation? Do you need an image for building a cloud-based application?
Fedora offers three separate products for you that are streamlined and configured out-of-the-box for these key uses of Fedora.
Upcoming Beta Release is planned for Tue 28 Oct 2014