iTaskbar is described as 'The one and only taskbar for OS X. Try it out and become more productive!' and is an app in the OS & Utilities category. There are three alternatives to iTaskbar for Mac. The best alternative is uBar. Other great apps like iTaskbar are ActiveDock (Paid) and MultiDock (Paid).
ActiveDock - Alternative Dock for macOS, Apple Dock replacement Customizable Dock for macOS, Application Launcher,Window Manager/Window Switcher, Star Menu for Mac… Problem: Apple Dock is the command center for your Mac.