Flare is an ActionScript library for creating visualizations that run in the Adobe Flash Player. From basic charts and graphs to complex interactive graphics, the toolkit supports data management, visual encoding, animation, and interaction techniques. Even better, flare features a modular design that lets developers create customized visualization techniques without having to reinvent the wheel.
Link to website: http://flare.prefuse.org/
- Up to date information about the software in this list, which is mostly free to use, can be obtained from this link