ShowMyPC is described as 'provides free and premium tools for Instant Collaboration to all users' and is a Remote Desktop tool in the network & admin category. There are more than 50 alternatives to ShowMyPC for a variety of platforms, including Windows, Mac, Linux, iPhone and Android. The best alternative is TeamViewer. It's not free, so if you're looking for a free alternative, you could try Skype or Chrome Remote Desktop. Other great apps like ShowMyPC are AnyDesk, Remmina, DWService and NoMachine.
Skype is the most popular free voice-over IP and instant messaging service globally. It allows users to text, video and voice call over the internet. Users can also call landlines and mobiles at competitive rates using Skype credit, premium accounts and subscriptions.
Remmina is a remote desktop client written in GTK+. Remmina primarily targets system administrators and travelers that need to work with computers remotely in front of either large monitors or tiny netbooks.
DWService is an half (only the client/agent) 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.
TigerVNC is an advanced VNC implementation. It is based on the fourth generation of VNC. TigerVNC also includes features from the TightVNC and TurboVNC projects. This includes accelerated JPEG compression. TigerVNC supports the latest X.Org X server.