Remmina, RealVNC Connect, TeamViewer, AnyDesk, RustDesk, UltraVNC, TightVNC, Chrome Remote Desktop, DWService, Apponfly, X2Go, NoMachine, GoTo Resolve, RemoteApp Tool, MyRDP, Ericom Connect, Jitsi Meet Electron, Xpra, Netop Remote Control, droid VNC server, LogMeIn Rescue, KRDC, Remote Desktop Plus, Educator, Igiko, WifiMouse, Oko Szefa, DuoRDP, UserMonitor, Yugma are some alternatives to Thincast Client.