Very useful AS2 to AS3 migration reference.
PHP implementation of the Action Message Format. If you need to transfer large data sets between the server and your Flash application remoting enables you to use native Flash data types which cuts down on time and resources needed to parse and transfer data.
Collection of useful AS3 optimization suggestions and links.
Unit test framework for Actionscript.
Web debugging proxy which I find indispensable for inspecting traffic between server and swf files.
Has support for remoting (AMF0 and AMF3) and can do bandwidth throttling.
The only resource listed here that is not free, but definitely worth a mention here due to being extremely useful.
You can try the 30 day demo and see if you think it’s worth the asking price compared to for example Fiddler which is a free alternative.
My favourite Actionscript editor. IMO the code completion is much better than FlexBuilder and it comes with MTASC and SWFMill to create AS2 swf’s and integrates with MXMLC for AS3 projects so it very easy to get started using it as an all-in-one solution for developing Actionscript applications.
Simple but very useful Firefox extension that enables you to view trace output in your web browser which is very handy when you need to debug an application while it’s running on the server.
I have to admit that I haven’t actually tried it out properly yet since it hasn’t been applicable for the kind of projects I have been working on lately, but I had a quick look at it and it really seems like a very neat framework for certain types of projects.
A neat little AS3 component set from bit101. As the name suggests it’s very minimal but usually I find full fledged architectures, like ASWing or the ones that comes with CS3, to be a bit overkill in most cases and it’s a great example to study if you like to make your own AS3 components.
They are drawn from code and hence have a tiny footprint but are not skinning friendly.
For AS2 I have mostly been using Bit101′s commercial
BitComponentSet and I would love to see a similar set for AS3 but for now MinimalComps has come in very handy for simple little apps and prototyping.
Open source AS3 audio library started by Andre Michelle and Joa Ebert.
If you want to be able to generate or process sound without using Flash Player 10 it will help you do that, but it’s also possible to use the generators and processors with the new samplesCallbackEvent functionality of FP10 as well.
So if you are interested in Flash audio it certainly very worthwhile to check out.
To implement deeplinking and back button functionality when possible on Flash projects have been a concern of mine for quite a while, both due to usability and SEO concerns. Back in 2005 I developed my own solution, but it was something I quickly hacked together and although functioning and better than anything I could find at that time I always thought it could be a lot neater and was hoping someone would step up and create a package that could gain popularity with a lot of developers.
Hence I was very happy when SWFAddress came along with a package that is solid, neat and easy to implement.
I guess there is not much to say here. You’re probably familiar with SWFObject already, but in case you are not just get it and start using it to embed you swf with it now.
Not only is it a very convenient way of adding version detection, providing alternate content and passing on query parameters to the swf but it also has the benefit of avoiding the < a href = “http://www.baekdal.com/articles/technology/microsoft-ie-activex-update/” >IE issues with activation of embedded content.
Easy to use version control software for Windows.
The fastest tweening engine for AS3 with very neat syntax and always my first choice for tweening duties along with it’s smaller siblings TweenLite and TweenFilterLite.
I have come across scenarios where it doesn’t behave as expected (I guess due to the fact that it doesn’t search for overlapping tween properties to overwrite only those properties) and then I stick with Tweener which has very respectable speed and equally neat syntax.