TinkerTool is described as 'application that gives you access to additional preference settings Apple has built into Mac OS X. Thllows to activate hidden features in the operating system and in some of the applications delivered with the system'. There are more than 10 alternatives to TinkerTool for Mac. The best alternative is Cocktail. It's not free, so if you're looking for a free alternative, you could try Deeper or MacPilot. Other great apps like TinkerTool are BlueHarvest (Paid), Almighty (Paid), Dockey (Free) and Eject for Windows (Free, Open Source).
Almighty is a convenient and easy to use macOS menu bar application that exposes powerful configurations for your Mac. - Native: Written in pure Swift and truly native to embrace the Mac experience. Built exclusively for Big Sur.
Deeper is a personalization utility for Mac OS X which allows you to enable and disable the hidden functions of Finder, Dock, QuickTime, Safari, iTunes, Login window, Spotlight and many Apple’s applications.
Dockey makes changing some of the more advanced Dock preferences as easy as clicking a button. With integrated preview, you can see how it would look and feel like and save changes you're happy with the result.
Eject for Windows is a small application for Mac OS X that removes hidden files (like DS_Store, ._ AppleDouble, .Spotlight-V100 .Trashes etc.) in a USB flash drive mounted on your Desktop and eject it. It is Open Source, GPL licensed. The source is available on the website.
cDock 3 gives you full control over the Dock. There are tons of ways to customize the look and feel of the Dock. You can even enable some awesome hidden features. cDock is designed to make theming your Dock easy and robust on macOS 10.10 and up.