mRemoteNG is a tabbed, multi-protocol, remote connections manager.

mRemoteNG allows you to view all of your remote connections in a simple but powerful tabbed interface.

mRemoteNG supports the following protocols:

RDP (Remote Desktop/Terminal Server)
VNC (Virtual Network Computing)
ICA (Citrix Independent Computing Architecture)
SSH (Secure Shell)
Telnet (TELecommunication NETwork)
HTTP/HTTPS (Hypertext Transfer Protocol)
rlogin (Remote Login)
Raw Socket Connections

mRemoteNG Features:

Panels and tabs allow to group certain connections together, dock them to any side of the window or completely undock them and move them to another screen for example
Multiple supported protocols (RDP, VNC, ICA, SSH, Telnet, RAW, Rlogin and HTTP/S)
Easy to organize and maintain a list of connections
Inheritance makes it possible to store properties on folder basis and let the underlying connections inherit this info
Support for importing connections from Active Directory
Allows creating nested containers (folders) to categorize connections
"Quick Connect" feature to quickly open a connection without creating an entry
"Quick Search" feature to quickly find a connection while typing
Support for SCP/SFTP (SSH) file transfers
Assign icons to connections to easily identify their purpose
Screenshot manager allows to collect multiple screenshots and save them all together or copy them to the clipboard
View remote session info and log off sessions (RDP)
Portable (with the use of command line switches)
"Auto-Update" feature
Show description tooltips when hovering over connections
System tray icon with a connection menu
Fullscreen (Kiosk) mode
Assign global credentials to use when no information is provided on a connection basis
Host Up/Down (Ping) feature shows if the selected host answers to a ping