The best Shell Extension alternative to WindowBlinds is StartIsBack. It's not free, so if you're looking for a free alternative, you could try Spencer or SmartWindows. If that doesn't suit you, our users have ranked more than 25 alternatives to WindowBlinds and four of them are Shell Extensions so hopefully you can find a suitable replacement.
StartIsBack returns Windows 8 a real fully featured start menu and start button, behaving exactly like the ones in Windows 7. StartIsBack radically improves desktop usability and makes new Start screen clutter-free.
Start Menu 8 can help users who are not willing to change their behaviors and bring back the classic start menu. Users can enjoy a familiar start menu again with just one click while other styles are also available.
Bring back the Classic Windows XP Start Menu to Windows 8 & 10. With one click you have access to all of your Start Menu entries. Plus direct access to the Control Panel, Administrator command line and Run dialog.
SmartWindows streamlines the way you work. It is perfect for professionals looking to optimize the overall work experience or switch between projects. You can save display preferences for applications with the help of a few clicks.
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For like the fourth time, It's a paid option where open source versions exist, AND it's not intended to skin Windows, just the start menu and etc.