FinViz.com tools

A friend recently told me about FinViz.com.  What I was initially impressed by was the heat map type graphs that they have of different indexes like the S&P500.  However, they also have an excellent stock screener too.  Cheers.
Disclaimer: Please only use this information with a grain of salt and at your own risk / for educational purposes. I am not an investment advisor so please seek professional help if that's what you're looking for.