Classic Shell - Classic Shell was developed for Windows 8 since that was the first version of the popular operating system to forgo the iconic Start menu.
Cairo Shell - Cairo is a desktop environment for Windows.
StartIsBack - StartIsBack returns Windows 10 and Windows 8 a real fully featured start menu and start button, behaving exactly like the ones in Windows 7. It's totally awesome and easy solution for your new Windows woes.
WindowBlinds - WindowBlinds is a computer program that allows users to skin the Windows graphical user interface.
Start Menu X - Start Menu X with Start Button. Power users know how inconvenient and time-consuming it is to launch programs from the system menu.
BB4Win - BB4Win (Blackbox for Windows) is an alternative shell for Microsoft Windows.