beamer

This LaTeX-based slide preparation tool kicks butt, and beats PowerPoint all to hell. I said goodbye to Word about 4 years ago, and now I can give up PowerPoint.

What about Excel? I'd like to be done with it too.

Not that I can avoid paying for "Office" because I still want to be able to read other people's MS-based stuff. (I know, there are free readers for that, too, but I don't want to replace Word/Excel/PowerPoint with weaker, slightly buggy "compatible" versions). I just don't want to have to use this stuff at all, if possible.