What are some alternatives?
When comparing Classic Shell and Start Menu Reviver, you can also consider the following products
Open Shell - Open Shell is a fork of the Classic Shell project for Windows that getting back the classic start...
Start8 - Start8 returns the familiar Start menu to Microsoft's latest Windows 8 operating system.
Start10 - Start10 adds the familiar Windows 7 start menu experience to Windows 10.
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.
Power8 - Start menu replacement for Windows
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.