PuTTY is a free SSH client developed by Simon Tatham and others. This page contains a port to the Symbian OS, with support for S60 third edition smartphones and Series 80 Communicators. Separate UIQ ports are available from Robert Horvath and MobilEyes AB for UIQ 1 and 2, and from Taneli Leppä for UIQ 3.
PuTTY 1.5.2 for Symbian OS has been released! This is a maintenance release for PuTTY 1.5, and contains bug fixes for S60 3rd edition. Get the release from the SourceForge project page or the download page. Note that version 1.5 does not support S60 5th edition touchscreen phones such as the Nokia 5800 XPressMusic or N97, for those you should use Risto Avila's PuTTY Touch UI.
Risto Avila has been working on a dedicated PuTTY Touch UI for S60 5th edition, and it provides a much improved user experience on phones such as the Nokia 5800 XpressMusic and the new N97. Give it a try!
For more information on PuTTY for Symbian OS, see the following pages:
Downloadable files and mailing lists are available at the SourceForge project page.