This software offers a theme that allows users to customize the appearance of their Dock.
Installing Blade Dock is simple, but requires a few steps. You'll need to go to your Mac's HD, then navigate to /System/Library/Core Services/. From there, you'll need to right-click on "Dock" and select "Show Package Contents." Once inside, navigate to /Contents/Resources/ and backup the files you're about to replace. Move the original files to the trash and then move the downloaded files into the same folder.
Finally, you'll need to open Terminal and enter "killall Dock" (without the quotes) to view your new Dock. Overall, Blade Dock is a great option for those looking for a free way to customize their Mac's appearance.