Winstep Xtreme - An integrated workspace environment, Winstep Xtreme is a powerful suite of desktop enhancement...
Open Sidebar - Open Sidebar is a vertical bar on your Windows Desktop that helps you keep your gadgets organized.
Pokki - Window 8 Start Menu by Pokki. Get your Start menu back and more. “The Windows 8 Pokki Menu is a crowd-pleaser.” “restore the Start Menu, but with an updated look and feel”. “Pokki helps [Windows 8] a lot.
Vista Rainbar - Vista Rainbar is a Windows Sidebar clone for Rainmeter.
KDE Plasma Desktop - Plasma Workspaces is the umbrella term for all graphical environments provided by KDE.
Object Desktop - Object Desktop is a Windows customization and productivity enhancement suite.