CRLF from Horst Schaeffer's freeware collection
PBATS - a 16-bit DOS program, but worked well for me on XP. A quick check shows it appears to work well under Vista Home Premium as well.
CRLF 1.3 (c) Horst Schaeffer
Filter, makes CR+LF for lines terminated by CR or LF only
Options:
/C lines to be terminated by CR only
/L ... by LF only
/T cut trailing blanks
/E[n] remove empty lines [if more than n]