Personally, I won't put anything Microsoft on my computers. MS installs too many small, hidden files that don't go away when un-installed.
Pages (Apple's new program in iLife) is not really a word processor, yet an excellent page layout program. TextEdit, which you do have in OS X on your Mac, is a better word processor. So it depends on what you are looking for and trying to do.
What are you trying to do? What apps are you looking for? Word processing? Spreadsheet? Database? Drawing? Painting? Presentation? All the above?
Are you specifically looking for AppleWorks? Did you find it in your Applications folder? I use AppleWorks everyday and have for seems like over ten years. I have never had compatibility problems with others.
I am surprised if AppleWorks is not provided with pro systems. Yet I have never heard of nanosaur and you were also looking for that too. Check your installation discs that came with your Mac.
Well, I just remembered one quirky thing about the AppleWorks installer. AppleWorks runs great in OS X, however the AppleWorks installer only runs in Classic (or OS 9). So, if you choose to not install Classic, then you don't get AppleWorks. Meaning that if you don't have Classic (OS 9) on your Mac, then you probably don't have AppleWorks. If you do have Classic (OS 9), then the AppleWorks installer should be on one of the install discs and a selectable option within the OS X installer.
There is a "work around" if you have an OS 9 (Classic) system or know someone that has an OS 9 (Classic) system.