I'm aware of FusionCharts, are there other good solutions, or APIs, for creating charts in Adobe Flash?
Is there a reason that you want it in Flash? If a plain, old PNG will work, try the Google Chart API.
http://teethgrinder.co.uk/open-flash-chart/ seems really sweet. I suggest you give it a look.
UPDATE: Open Flash Chart 2 is out: http://teethgrinder.co.uk/open-flash-chart-2/
Depending on your needs, a couple others you might look at:
I think the best Flash charts are amCharts - nice looking, highly customizable and free (if you don't mind the link back to amcharts.com)
XML/SWF Charts does Chart off XML:
I know you said flash, but this is a good silverlight chart api. http://www.visifire.com/. Always good to keep your options open right?
Had to plug silverlight, but you can also take a look at Yahoo!'s YUI charting component.
open-flash-chart because you can't resize a .png and .png has no tooltips. Also why would you send all your data to google? Do you trust them that much?
I can vouch that I've had good experiences with PHP/SWF charts (and by extension, the XML/SWF charts too). It's easy to create really subtle chart effects. Pie charts fading in one slice at a time looks fairly professional without being annoying.
Edit: Scratch that, Open-Flash-Chart looks WAY better. I recede my suggestion.
Adobe's data visualization package is now free after the release of Flash Builder 4.
Charting and other libraries are on this site - http://opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4
MultiChart, because it beats all the others in all parameters.
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