MobaXterm is a set of network tools included in a single portable exe file. MobaXterm integrates an X server and many network clients (SSH, RDP, VNC, telnet, rlogin, sftp, ftp, ...) accessible through a tab-based terminal.

Key features:
Free X server fully configured (based on Xorg)
Tab-based terminal with antialiased fonts and macro support
Easy DISPLAY exportation from any remote host
X11-Forwarding capability in SSH
Program without installation that you can start from an USB stick
Light and portable application, packaged in a single executable