WARD I used Chicken of the VNC for a long time ... until I started experiencing chronic dropped connections, sometimes after 5 minutes, usually after 15-20 minutes.
My search last December for an alternative led me to JollysFastVNC. What a dramatic improvement! I don't recall a single dropped connection since then.
The few times I've corresponded with Jolly (aka Patrick), he's very quick with a helpful response. For example, I just asked about Snow Leopard compatibility, and he responded with good news ("It is compatible.") before I had time to get a fresh cup of coffee.
(Version 0.98.44)