Posted: 2013-06-30 23:22
Type in google "G4FON" and another search for
"Just Learn Morse Code"
Those two programs are able to do everything you want and more.
You don't need Internet at all, after downloading those programs.
Advantage of this website are graphs with ones proceedings but the noise is tremendous, in my experience, due to the fact the the max score of a load has a deviation of 20%
Furthermore you can download ebook2CW from this website, which give you the possibility to produce Morse code MP3 files from text, like a free available book text.