VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Ruffle - An open source Flash player
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Flash Player 2021 - Want to fix "This plugin is not supported" and "Adobe Flash Player is blocked" error messages? This extension will remove those messages and allow you to play Flash in any website with a single click.
Winamp - Winamp is a media player that allows users to play multiple-file formats, arrange media in a varied file-management system, and play unique media with AAC encoding.
CheerpX for Flash - its adobe flash player in webassembly