Thincast Client is described as 'turns your computer into a fully Remote Desktop Protocol (RDP) Client, making it easy to connect remotely to your company's infrastructure' and is a Remote Desktop tool in the network & admin category. There are more than 100 alternatives to Thincast Client 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 Chrome Remote Desktop or Remmina. Other great apps like Thincast Client are AnyDesk, DWService, UltraVNC and TightVNC.
Thincast Client is mainly a Remote Desktop Tool but alternatives to it may also be Video Calling Apps. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Thincast Client.
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.
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 desktop application. 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.