Fedora Copr is a build system (like OBS) where you can easily set up your own software repository, but unlike OBS, it's specifically for Fedora.

DNF, a package manager introduced in Fedora 21, has built-in support for Fedora Copr. When you want to get Rust programming language installed, for example, just do this:

dnf copr enable fabiand/rust-binary
dnf install rust-binary

In case a software you want is not in the official repository, search Fedora Copr for it, chances are that it's already there.