There are plenty of free flash charts available on the net if you are looking for bar chart, pie chart, line chart, etc. You can download and integrate any kind of flash chart with your applications which are either financial or statistical projects.
Open Flash Chart which is really free and you can download full source codes including .fla files and PHP classes.
FusionCharts Free is another good choice for you. It can be integrated with popular server-side technologies such as ASP, ASP.NET, JSP, PHP, and Ruby on Rails. They also have a paid version which you can compare features in this page.
You may also take a look at other Flash Chart websites: