Plasma Next Alpha 1

Kubuntu early packaging from Experimental PPA (This will remove your KDE 4 applications and desktop.)
Kubuntu Daily builds on Project Neon 5 (This will co-install with existing KDE Software)
Fedora F20+: http://copr.fedoraproject.org/coprs/dvratil/kde-frameworks/
openSUSE 13.1 & Factory: https://en.opensuse.org/SDB:KDE_repositories#KDE_Frameworks_5