StartFinity installs a Start Button and a Start Menu. A free version suitable for trialing doesn't allow customizing the menu and has a command, WinAbility, that leads to WinAbility's store. It's not for commercial use. One commercial-use license costs $4.95; 10 cost $29.95.
StartIsBack creates a full-featured Start Button and Menu that behaves just like the ones in Windows 7, the company says. It requires no privileges. Free 30-day trial; $3 to buy.
Start Menu 8 restores the Start Button and Start Menu, and offers the option to skip Windows 8 start page, booting instead to the Windows 8 desktop directly. It's free.
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