DeskShare is described as 'With DeskShare, you will show the others your screen or view their desktop. Live via Internet, on demand' and is an app in the Remote Work & Education category. There are more than 25 alternatives to DeskShare for a variety of platforms, including Windows, Linux, Mac, 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 UltraVNC. Other great apps like DeskShare are TightVNC (Free, Open Source), NoMachine (Freemium), VNC Connect (Freemium) 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.
UltraVNC is easy to use and free software that can display the screen of another computer (via the Internet or a local network) on your own screen. The program allows you to use your mouse and keyboard to control the other computer remotely.
TightVNC is a free remote control software package. With TightVNC, you can see the desktop of a remote machine and control it with your local mouse and keyboard, just like you would do it sitting in the front of that computer.
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.
xrdp provides a graphical login to remote machines using RDP (Microsoft Remote Desktop Protocol). xrdp accepts connections from variety of RDP clients: FreeRDP, rdesktop, NeutrinoRDP and Microsoft Remote Desktop Client (for Windows, macOS, iOS and Android).