The following are As3 open source projects:
1. Flex/Actionscript Math Library
The Flex/Actionscript Math Library (as3mathlib) is intended to provide a rudimentary numerical analysis toolkit for the Actionscript/Flex programming environment.
This library has just been converted from Actionscript 2 to Actionscript 3. It is not ready for general use.
2. ActionScript 3.0 library for several basic utilities
The corelib project is an ActionScript 3 Library that contains a number of classes and utilities for working with ActionScript 3. These include classes for MD5 and SHA 1 hashing, Image encoders, and JSON serialization as well as general String, Number and Date APIs.
AlivePDF is a client side AS3 PDF generation library for Adobe Flash, Flex and AIR.
Tweener (caurina.transitions.Tweener) is a Class used to create tweenings and other transitions via ActionScript code for projects built on the Flash platform.
Flare is a collection of ActionScript 3 classes for building a wide variety of interactive visualizations. For example, flare can be used to build basic charts, complex animations, network diagrams, treemaps, and more. Flare is written in the ActionScript 3 programming language and can be used to build visualizations that run on the web in the Adobe Flash Player. Flare applications can be built using the free Adobe Flex SDK or Adobe’s Flex Builder IDE. Flare is based on prefuse, a full-featured visualization toolkit written in Java. Flare is open source software licensed under the terms of the BSD license, and can be freely used for both commercial and non-commercial purposes.
Developed for use with ActionScript 3, Flash 9 and Flex 2 projects it provides an inversion of control container for components that support dependency injection.Support for constructor and setter injection, with setter injection available to public variables, setter accessors, and methods.
7. AS3 Data Structures For Game Developers
AS3 Data Structures For Game Developers’ is a library containing data structures optimized for game development with Adobe Flash and Actionscript 3.
8. Pulse Particles System
It is a general purpose particle system for AS3 development.The pulse-particle system allows Flash developers to quickly and easily set up a wide range of particle effects. There are two ways of using the system, through an object orientated API that gives full control over the system, or through a simplified object syntax.
9. AS3 GIF Player Class
AS3GIF lets you play and encode animated GIF’s with ActionScript 3
10. Fisix Engine
The Fisix Engine is an Actionscript 3.0 physics engine built for game developers.
APE (Actionscript Physics Engine) is a free AS3 open source 2D physics engine for use in Flash and Flex, released under the MIT License. APE is written and maintained by Alec Cove.
It is a collection of Flash libraries.A command line tool for creating ZLIB compressed archives that can be streamed in progressively from the Flash player at run-time, using the provided ActionScript 3 API.
13. MinimalComps: Minimal AS3 UI Component Set
It is a Minimal AS3 UI Component Set.
14. Google Map Flash Interface
Critical Mass has developed a portable Flash interface for the Google Maps API. It’s written in ActionScript 2, and should be able to integrate with most AS2-based Flash projects that can accept external modules.
15. ScaleBitmap : 9-slice bitmap class
The owner have just finished a simple class which allows you to resize dynamically any Bitmap (just like the MovieClip.scale9Grid feature).
XIFF is an Open Source Flash library for instant messaging and presence clients using the XMPP (Jabber) protocol. XIFF includes an extension architecture that makes it easy to add functionality for additional protocol extensions, or even your own special-needs extensions. There are quite a few extensions already included in the library, giving it support for XML-RPC over XMPP (XEP-0009), Multi-user conferencing (XEP-0045), Service browsing (XEP-0030), and XHTML message support (XEP-0071).
FOAM is primarily intended as a resource for developers interested in simulating physics. It has a carefully thought out OOP structure and modular design. A savvy developer should have no problem extending and repurposing FOAM to his own ends. The Foam datatype is in fact not a physics engine but an interface for simulating physics. It offers a simple means to create, control and run a simulation- it purposefully keeps the more nitty gritty, behind-the-scenes operations shielded from the casual developer. A physics engine is simply part of its composition.
Box2DFlashAS3 is an open source port of Erin Catto’s powerful c++ physics library Box2D.
It is an open Source realtime 3D engine for Flash
Away3D is a realtime 3d engine for flash in ActionScript 3.0, started by Alexander Zadorozhnyy and Rob Bateman
SWFAddress is a small, but powerful library that provides deep linking for Flash and Ajax. It’s a developer tool, allowing creation of unique virtual URLs that can point to a website section or an application state. SWFAddress enables a number of important capabilities which are missing in today’s rich web technologies
Wrapper is a cross-browser compliant HTML/CSS rendering engine written in ActionScript that sits on top of your standards compliant HTML page. Wrapper eliminates cross-browser issues and makes integrating ActionScript and HTML/CSS projects possible without needing to compile. Have introduced it in previous article Wrapper WordPress Theme.
24. ASTRA Galore
ASTRA Galore: New Flash and Flex Components
The ASTRA library of components has just been updated with three new Flash components and seven new Flex components, as well as some important updates to the existing ones.
25. The Ruby on Rails RIA SDK by Adobe
The Ruby on Rails RIA SDK by Adobe provides developers with samples and code to help develop solutions with Ruby and Adobe technologies. The SDK includes open source code created by third parties as well as samples and demos that have been created by project members.
This library is an actionscript 3 implementation of the Stomp protocol. It enables communication between Flash or Flex and any Stomp broker.
FlexUnit is a unit testing framework for Flex and ActionScript 3.0 applications and libraries. It mimics the functionality of JUnit, a Java unit testing framework, and comes with a graphical test runner.
28. Visual FlexUnit
Visual FlexUnit is an Allurent open source project to establish a framework for the testing of components’ visual appearance. The goal is to enhance FlexUnit with additional features to support “visual assertions”. In a nutshell, a visual assertion asserts that a component’s appearance is identical to a stored baseline image file.
UMap is the Universal ActionScript 3.0 Mapping API. The scalable component model allows you to create rich maps with interactive data layers. Our flexible API enables developers to build fully-customized solutions. The current version is integrated with OpenStreetMap and Microsoft Virtual Earth map data.