I have an Actionscript 3.0 app that I've made using a trial copy of Adobe Flash Builder 4.5.
Now, Flash Builder license has expired.
Is there any way to compile my code without using Flash Builder?
I read somewhere that there is a free compiler to do that. What about Flex? Is free? Maybe I can use my actionscript code with Flex
You can get free Flex SDK (which is used in Flash Builder). You can get it here (4.5) or here (4.1). Then read official documentation about application compiler and apply these knowledges to your project.
And additional note. If you're student or uneployment you can get Flash Builder 4.5 Standard for free here.
As the above answerer suggested, you can use the free Flex SDK. To go with this I would highly recommend flash develop (http://www.flashdevelop.org).
A fantastic tool for developing Flash based content without the flash IDE.
