looks like a free download? wow. did not know that. I'm like 3 major OS versions behind, I cant believe they are offering this for free.
free works for me. Im downloading it now.
Before you install Mavericks, I recommend that you do this...
Open System Profiler
(in the /Applications/Utilities folder; or in:
Apple menu --> About This Mac --> More Info)
click on the disclose triangle next to Software, choose Applications, then click on the Kind column to sort by kind.
An application that has a Kind of “Universal” or “Intel” will most likely run fine in Lion and later. Any application that has a Kind of “Classic” or “PowerPC” won't run under Lion or later.
If you would like to generate a text file that lists all of the PowerPC applications on your hard drive, complete with the path to get to each of these applications, copy and paste this line into the Terminal application (in your ~/Applications/Utlities folder), hit return, and then be patient and let it run for a few minutes before opening the text file that will be generated on the desktop.
system_profiler SPApplicationsDataType | grep -A4 PowerPC > ~/Desktop/Applications_Report.txt
You may find that a significant portion of your software will break if you upgrade your OS. That software might be expensive to replace with upgraded copies or alternates.
You can find comprehensive information about which application versions run in which versions of OS X here:
RoaringApps - Application compatibility and feature support for OS X and iOS
If you use Eudora or AppleWorks you should really think twice about upgrading your OS. You would be leaving them forever behind.