Corebird is an awesome GTK+3 desktop twitter client. I am in the process of getting it added to the official fedora repos, but in the mean time, i have a version packaged — for fedora 20 only — and ready to be used in my fedorapeople repos.
To set this up on your Fedora machine, first download the .repo file:
sudo curl -o /etc/yum.repos.d/fedora-corebird.repo http://repos.fedorapeople.org/repos/ryanlerch/corebird/fedora-corebird.repo
Then install corebird: