TeamViewer - TeamViewer lets you establish a connection to any PC or server within just a few seconds.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
mRemoteNG - mRemoteNG is a fork of mRemote, an open source, tabbed, multi-protocol, remote connections manager.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
join.me - Instant screen sharing. Instant Aha!
GNOME Terminal - GNOME Terminal is a terminal emulator for GNOME desktop.