A list of the best libraries for Flex and Flash that can save heaps of development time and add extra functionality to your projects.

  • casalib Lots of useful utility classes.
  • as3corelib A collection of utility classes by Adobe for handling encoding and serialization among other things.
  • Mate Framework – my favorite MVC  framework for Flex – it’s based on property injection
  • PureMVC – another great MVC framework, works with flash as well and has ports to many other languages
  • Cairngorm – popular MVC framework for Flex that’s officially supported by Adobe
  • FlexUnit – unit testing framework for flex – essential for test infected developers and professional projects
  • AS3Crypto – add cryptography to your Flash/Flex Applications
  • AlivePDF – lets you create PDF files from within flash and flex
  • Degrafa – Flex Graphics Framework to easily create graphic with mxml tags – awesome
  • TweenLite The easiest to use Tween library out there.
  • Papervision probably the most used 3D library
  • Away3D Another 3D library that some people prefer to Papervision as it is easier to use.
  • Modest Maps – great mapping library for using different map providers – also supports openstreemaps
  • SWFObject very useful to embed flash movies into html pages
  • SWFAddress Takes swfobject one step further and supports deep-linking.
  • Hi-ReS! Stats a class that shows you when your SWF framerate chokes.
  • BIT-101 MinimalComps A set of ActionScript-only UI components for use in non-Flex projects.
  • Underware – not a library but a nice tool that lets you package and download sets of popular libraries
  • Deface – Face detection for AS3
  • FLARManager – tool for augmented reality
  • Discollision – advanced collision detection library fro AS3
  • Flash Camouflage - easily skin Flash Applications with png, jpg, or gif images
  • MojoColors – easy color library for AS3
  • Flint Particle System - the name says it all – create particles in AS3