JPEXS Free Flash Decompiler - JPEXS Free Flash Decompiler (FFDec) is an opensource Shockwave Flash (SWF) decompiler.
Ruffle - An open source Flash player
Sothink SWF Decompiler - Sothink SWF Decompiler, a professional Flash decompiler easily decompiles one or more SWF to FLA.
BlueMaxima's Flashpoint - the webgame preservation project.
SWFTOOLS - SWFTools is a collection of utilities for working with Adobe Flash files (SWF files).
CheerpX for Flash - its adobe flash player in webassembly