TightVNC is a cross-platform free and open-source remote desktop software application.

Remmina is a remote desktop software client for POSIX-based computer operating systems. It supports the RDP, VNC, NX, XDMCP, SPICE and SSH protocols.

TigerVNC is VNC server and client software, started as a fork of TightVNC.

Vinagre is a VNC, SSH, RDP and SPICE client for the GNOME desktop environment.

KRDC is a client application that allows you to view or even control the desktop session on another machine that is running a compatible server.

RealVNC is a software consisting of a server and client application for the Virtual Network Computing (VNC) protocol to control another computer's screen remo…

NoMachine is a remote connectivity and network computing software.

PAC is a SecureCRT/Putty/etc (connections manager with automations) equivalent for the Linux world.

Apache Guacamole is a clientless remote desktop gateway. It supports standard protocols like VNC, RDP, and SSH.