8 Best Free (Open Source) Flash editor software to use
1. Flash Develop
2. Vectorian Giotto
3. Ajax Animator
Salasaga is an easy to use GUI authoring environment that helps you create visually impressive and useful Flash based learning material. easy to use GUI authoring environment that helps you create visually impressive and actually useful learning material. Also incorporate an AJAX, playback capability for advanced content creating
5. Open Dialect
Open Dialect is a free and useful flash tool. Open source Flash IDE based on Adobe Flex created with the intent to help System Dynamics Modelers to create and publish Interactive Learning Environments to their work. it’s a free flash IDE which allows anyone from beginners to advanced Flash coders to create Rich Internet Applications quickly and easily. Use the Adobe AIR runtime and supports 17 different components and action script scripting can be done using either a wizard
6. Motion Twin ActionScript 2 Compiler
Motion Twin ActionScript 2 Compiler or Mtasc can compile large number of .as class files in a very short time and generate directly the corresponding SWF bytecode without relying on Macromedia Flash or other tools.
minibuilder is a free and lightweight IDE specially designed for developing programs written in Action Script 3. MiniBuilder provide a completely free and cross platform alternative for developing Action Script projects. Good interface and easy to use
Ming is a library for generating Macromedia Flash files swf files. Ming use a PHP Module that allows for the dynamic generation of Flash animations.
9. Sothink SWF Quicker
Now, If you didn't tried any of 'em for creating your flash file/editing your flash file, download one and use. And if you already use some software like this don't forget to mention :)