Financial charts

StockCharts.com provides a very wide range of financial graphics. You can pay for the "no time delay" upgrade, but all the summary and close data are available for free. It's a great resource.

There are many animated charts, too. Try the carpet charts -- each technology sector is presented as a set of carpet squares with each square representing a key company in that sector. Moving your cursor shows individual stats on the various company "carpet squares" and clicking on one square converts the data on other companies to relative measures comparing the current company to the selected company.