UltraVNC

http://www.jinx.de/JollysFastVNC.html
Jollys Fast VNC

This is the one that I use, I believe he will be releasing a new version that fixes a couple issues with SC, but it does work. And best of all it is free.

I know this is an old topic, but I have found a free VNC client that works the best I have found
http://www.jinx.de/JollysFastVNC.html
Works with SC as well as everything else, not to mention the developer is very nice as well. (No I am not the Developer)