TightVNC ( I haven't used this, just came accross it).
Free
http://www.tightvnc.comThe programmers at TightVNC have leveraged the work of AT&T into a revved-up version of VNC. Thanks to the hard work of Constantin Kaplinsky, TightVNC performs significantly faster than both the original VNC and pcAnywhere. TightVNC maintains compatibility with the original VNC and continues its emphasis on platform independence.
Here
