NASM - The Netwide Assembler, NASM, is an 80x86 and x86-64 assembler designed for portability and...
Ruffle - An open source Flash player
Yasm - Yasm is a complete rewrite of the NASM assembler.
SuperNova Player - SuperNova Player allows systems to play .SWF files in a standalone player launched from any browser.
MASM Builder - MASM Builder is a free Integrated Development Environment IDE for developing 32-bit Windows programs using the Assembler. MASM Builder contains many useful features which will assist you in creating Windows API based programs.
Lightspark - The Lightspark project