The Difference Between Fedora, Redhat, and CentOS

Differences

1. Fedora is the main project, and it's a communitity-based, free distro focused on quick releases of new features and functionality.
2. Redhat is the corporate version based on the progress of that project, and it has slower releases, comes with support, and isn't free.
3. CentOS is basically the community version of Redhat. So it's pretty much identical, but it is free and support comes from the community as opposed to Redhat itself.