Ruffle - An open source Flash player
BlueMaxima's Flashpoint - the webgame preservation project.
SWF File Player - SWF File Player is a free player for SWF (Shockwave Flash) files.
CheerpX for Flash - its adobe flash player in webassembly
Lightspark - The Lightspark project
OpenSilver - Open-source re-implementation of Silverlight on modern browsers using WebAssembly.