Ok, I'm already starting to pop through apps like a pro. I'll go ahead and mark this one as solved. I'll bet the Exposé or the combination of ⌘-Tab and ⌘-` will prove to be just as efficient, and maybe moreso after I get real used to it. Not Mac bashing here, but I just don't believe that there is no such command.
I'm sure there are similar needs for Mac users, and it doesn't take a genius to recognize that seeing/using apps simultanously would be most efficient - and the most efficent way of doing this would seem to be the tile command. Actually, it's the only thing keeping my PC in action because I just can't live without it, needing often to use (and view) various programs/applications simultaneously - like taking things from Word and Excel and pictures to create a Powerpoint presentation or something like that. Plus, I just couldn't believe that there was really NO command to tile things, which I use all the time, every day, and had always thought of as a basic, fundamental thing - Windows or not. Yes, I posted a few times screaming and all hoping I would get more notice and an answer. Ha! I ain't puttin no dirty ice in my Dewars I ain't puttin no Bootcamp in my Mac. Or follow my first (facetious) suggestion about installing Windows. Personally, I usually have several apps with several docs in each open at one time, and I find the combination of ⌘-Tab and ⌘-` quite efficient for moving through them. On the Mac, ⌘-` (the key just above Tab) cycles through open windows within an application. if you have three word docs open, Alt-Tab will cycle through them all), whereas ⌘-Tab on the Mac will cycle through apps, but not docs within apps (so, in the above example there's just Word, not 3 Word docs). One difference there is that in Windows Alt-Tab cycles through all open windows of all apps (e.g. Alternatively, you can use ⌘-Tab to cycle between apps, similar to Alt-Tab in Windows. So, you can teach yourself to use an alternatives like Exposé. +There is no Mac equivalent to the Windows "Tile Windows" command.+
Seriously, Mac OS X is not Windows, and vice versa. *Get a copy of Windows, install it on your Mac using Bootcamp, and viola, you will now have access to the Tile and Cascade functions by right-clicking in the toolbar*.
So, I'll give you the answer you seem to want: I see you have asked this question in several different ways in different forums, including SHOUTING your question in at least one post.