KDE 4.10 is released! New Features in KDE 4.10 includes plasma desktop, workspaces, Qt Quick, QML.. and more!
KDE Desktop for Ubuntu 12.04 LTS – with plasma desktop plus a lot cool applications!
KDE Plasma Desktop for Ubuntu 11.10!
KDE – plasma Desktop version 4.7 RC Released Today!
Try KDE Desktop on Ubuntu 11.04 – Natty Narwhal