NT4 DDK
hxxp://lad.dsc.ufcg.edu.br/download/nt4ddk.zip

98 DDK
hxxp://download.microsoft.com/download/win98SE/Install/Gold/W98/EN-US/98DDK.EXE
hxxp://www.tu-chemnitz.de/informatik/RA/educ/mop/98DDK.EXE

2K DDK
fxp://ftp.atfile.com/files/WindowsDDK/Win2k/2kddknly.exe
fxp://ftp2.atfile.com/download/WindowsDDK/Win2k/2kddknly.exe


DIRECTIO/GIVEIO
hxxp://lad.dsc.ufcg.edu.br/download/DIRECTIO.ZIP

98/NT/2K DDK was free at one time