Assembler Links
WinAsm Studio IDE, tutorials, source code, Assembler board: http://www.winasm.net
MASM32 is a working development for 32 bit Microsoft assembler (MASM): http://www.masm32.com/
Ewaynes's Win32 Assembly Homepage: http://asmedit.massmind.org
The site of flat assembler http://www.flatassembler.net/