I have long used Excel to outline my presentations. I love the program’s ability to color code, hide, apply hierarchy, move things around and maybe most importantly, get an accurate sense of timing.
My outlines tend not to be as granular as one row per slide, and I don’t actually write slide content in Excel, but if you did want to do that (and I see no reason why not to use Excel for this), Indezine has put together a nice tutorial on the workflow for going from Excel straight to slides.
It has long been a little-known workflow to outline in Word using paragraph-styled headers and bullet point and then with a few clicks, converting the Word document into actual slides. Apparently, you can do pretty much the same thing with Excel.
It’s a two-parter from Indezine: