IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Wonderfl - wonderfl is a service where you can build Flash(swf) online.
Lapce - Lightning-fast and Powerful Code Editor written in Rust.
Eclipse AXDT - AXDT is a plugin for Eclipse IDE that makes it possible to write MXML and AS3 with code support.
OpenVSCode Server - Run the latest VS Code on a remote machine accessed through a modern web browser - from any device, from anywhere.
Express Animate - Easily create stunning 2D animations using keyframes with this motion graphics software. Export to video, flash, GIF or HTML5. Free Download for Windows.