PuTTY is one of the big guys in the SSH and Telnet clients bunch with added abilities to connect through rlogin as well as raw TCP protocols to other computers. It also features an xterm terminal emulator in order to provide an effective environment for advanced users.
PuTTY Portable resembles the same great features while keeping its settings in the same place as the application, thus assuring you that none of them are written in the registry or the disk of the computer you are using it on. This makes it possible for you to run it from your removable flash drive or external hard drive.
One thing you must make sure of is that you can enjoy PuTTY within the legal boundaries of your country as it may interfere with both domestic and international cryptography laws from countries such as China, Singapore, Vietnam, Mongolia, Kazakhstan, Pakistan, Tunisia or Belarus.
PuTTY starts up revealing its comprehensive configuration panel to aid you customize and manage sessions and connections alongside the terminal and the window that wraps it in. You can easily opt for the connection type (Raw, Telnet, Rlogin, SSH and Serial) and set logging options for the currently selected session.
The Terminal section refers to various general settings as well as line discipline and remote-controlled printing. You may also set keyboard actions, alarms and advanced terminal features, while tweaking the appearance, behavior, translation or colors of the window. The Connection area allows customization of Low-level TCP connections, Internet protocol version, Login and Terminal details, Environment variables, Proxy type and other protocol-specific adjustments.
Once the connection is set up, you can control and use the resources of the computer that you linked to in a matter of seconds. PuTTY stores the hosts and their corresponding settings in order to facilitate fast yet accurate switches between machines and even supports most of the encryption algorithms such as AES, DES, Blowfish, 3DES or Arcfour.
PuTTY grants you control using the SSH encryption key and the protocol version, while providing SCP and SFTP clients accessible through command-line. It also supports X11 forwarding in addition to local, remote or dynamic port forwarding, the IPv6 protocol and authentication using public-keys.
The bottom line presents PuTTY as a vital application for experienced users in need of a sturdy yet fully-customizable environment for their PC-to-PC secure connections. Its wide-ranging array of supported protocols together with its execution speed make it worthy of its top spot within Softpedia’s Telnet/SSH Clients category.

What's New in This Release:
· Kerberos/GSSAPI authentication in SSH-2.
· Local X11 authorisation support on Windows. (Unix already had it, of course.)
· Support for non-fixed-width fonts on Windows.
· GTK 2 support on Unix.
· Specifying the logical host name independently of the physical network address to connect to.
· Crypto and flow control optimisations.
· Support for the [email protected] SSH-2 compression method.
· Support for new Windows 7 UI features: Aero resizing and jump lists.
· Support for OpenSSH AES-encrypted private key files in PuTTYgen.
· Bug fix: handles OpenSSH private keys with primes in either order.
· Bug fix: corruption of port forwarding is fixed (we think).
· Bug fix: various crashes and hangs when exiting on failure,
· Bug fix: hang in the serial back end on Windows.
· Bug fix: Windows clipboard is now read asynchronously, in case of deadlock due to the clipboard owner being at the far end of the same PuTTY's network connection (either via X forwarding or via tunnelled rdesktop).