SWF File Player - SWF File Player is a free player for SWF (Shockwave Flash) files.
Ruffle - An open source Flash player
BlueMaxima's Flashpoint - the webgame preservation project.
SuperNova Player - SuperNova Player allows systems to play .SWF files in a standalone player launched from any browser.
Shubus Viewer - Text Editor, Game Player, Picture Viewer in one smart application!
Lightspark - The Lightspark project