From Fedora Project:
Fedora DeskTop Edition (64-bit) is a Linux-based operating system that showcases the latest in free and open source software. Fedora is always free for anyone to use, change, and distribute. It is built by people across the globe working together as a community the Fedora project. There are multiple desktops available for use with Fedora. Each one has a slightly different look and feel and offers varying levels of customization. Desktops affect how windows look and feel, icons, menus and various basic desktop interfaces.