Dockside is described as 'Is your friendly file shelf next to the macOS Dock, where you can drag and drop files, folders, apps, images, videos, and text for quick access or later use' and is a clipboard manager in the os & utilities category. There are more than 10 alternatives to Dockside for a variety of platforms, including Mac, Windows, Linux, Web-based and iPhone apps. The best Dockside alternative is NotchNook. It's not free, so if you're looking for a free alternative, you could try Folder Hub or DropNotch. Other great apps like Dockside are Yoink, ShakePin, Droplr and Unclutter.