Accurate? You mean in terms of colours? Firefox and Safari can be set to use embedded profiles. Not sure about other picture viewer. Found a rather outdated website, but maybe helpful: http://www.colorreference.de/
if you are using a Windows machine, try not to use Safari... cause its not very secure... what you can use is FireFox (with colour management turned on)... as an aside, the viewer in Vista seems to be colour managed...