Fog Creek Copilot is described as 'Copilot OneClick is a new feature that makes it even easier to support the people you help most often. Install Copilot OneClick once, then connect to their computers with just a single click' and is an app in the Network & Admin category. There are more than 25 alternatives to Fog Creek Copilot for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is TeamViewer. It's not free, so if you're looking for a free alternative, you could try DWService or NoMachine. Other great apps like Fog Creek Copilot are AnyDesk (Free Personal), VNC Connect (Freemium), LogMeIn (Paid) and Remotely (Free, Open Source).
DWService is an open source project which offers a service that allows access to remote systems (Windows, Mac, Linux, Raspberry...) using a standard web browser - without any component required on the client side.
VNC is remote access and control software which allows you to view and fully interact with one computer desktop (the "VNC Connect") using a simple program (the "VNC viewer") on another computer desktop or mobile device anywhere on the Internet.
LogMeIn gives you fast, easy remote access to your PC or Mac from your browser, desktop and mobile devices. Premium features like file transfer, file sharing and remote printing help you stay connected and productive wherever you go.