PuttyTabs

This is what the PuttyTabs does:

• It reads the Registry information of PuTTY. Open a new terminal window with a click.
• It displays Tabs for each opened window. Bring the desired window to front with a click.
• If a PuTTY window is on top, it highlights the corresponding tab.
• It consumes little space on the desktop, only the tabs and a small dropdown button are visible.

http://www.raisin.de/putty-tabs/putty-tabs.html