First of all, i think UltraVNC is the best VNC tool. Many thanks to the dev team

Next, I use UltraVNC, PuTTY and MS Terminal Server Client to manage all computers in my company.
But, i have to switch between each tool. So i design Remote Control Center.
From a single Windows GUI, you can run all your favorites remote control tools to open a connection to a computer, just by double clicking an icon.

This will launch the associated remote control tool with the good paramaters to connect to your computer.
This tool is released under GPL v2 and is available at http://remotectrlctr.sourceforge.net
Hoping this tool will help you

Best regards