Axiis has been designed to be a concise, expressive, and modular framework that let developers and designers create compelling data visualization solutions by assembling easy to understand building blocks into simple or complex visual representations of data. http://code.google.com/p/axiis/
Birdeye
BirdEye is a community project to advance the design and development of a comprehensive open source information visualization and visual analytics library for Adobe Flex. The actionscript-based library enables users to create multi-dimensional data visualization interfaces for the analysis and presentation of information. http://code.google.com/p/birdeye/
Client side Network Viewer, Rectangular Heatmap and Visualization Template implemented in actionscript and javascript using the google visualization API. http://github.com/ryanbressler/Lichen
Open Flash Chart 2
OK, Open Flash Chart 1.x was great and it works like a dream. But I made some little mistakes which over time grew and anyoyed me and made the source code weird. So I decided it was time to re-jigger the code and make it pretty again. The big change is moving the data format to JSON. This has made a big difference and has allowed some pretty cool new features. http://teethgrinder.co.uk/open-flash-chart-2/