One of my friends suggested the Rediff Portfolio tracker tool.
I find it quite useful and effective. Its much better than the portfolio tool available in ICICIDirect.com (in case you have a icici trading / demat account).
Please visit,
http://www.rediff.com/money/index.html
and look for "My portfolio".
Graphical representation, day-to-day changes and more. I am sure you would love to use it.
