Way too many to count. Several thousand at least, and that's just from Apple's Downloads section.
Pure Mac Multimedia Software makes multimedia software for Mac.
There are many browser based fax systems. The most well known software that was specifically designed for mac is the software Pagesender.
Parallels Desktop for Mac is a software package for Mac users to run Windows applications on their computers. This package is available from Amazon and many others
To download cheap software for a Blackberry Mac, one has many options. Cheap software can be found at the Blackberry website, the Crackberry website and even the Markspace website.
no now there are so YESApple now has a software update for its Mac Software that allows for the use of Apps on your Mac. Just do a software update on your Mac and it will load the necessary upgrades.
Blackberries can be synced to a Mac with the BlackBerry Desktop Software for Mac software (See links below).
iTunes is the best MP3 tagging software on my Mac.
AppFresh is Mac software (See links below).
You can't run Mac Software on Windows unless you installed Mac explorer To get Mac Explorer, you may check out this link. http://macexplorer.software.informer.com/
Many of Microsoft's USB Sidewinder products will work with Mac OS X. The addition of the GamePad Companion software (See links below) will allow for configuring the device with most Mac OS X software.
Every Mac comes with the X Code development software. There are many other options depending upon what kind of game you want to make and how good a programmer you are.
Difficult to put an exact figure on the number of software titles compatible with OS X. It will probably run into the millions. Most of the major software developers (such as Microsoft and Adobe) have their own Mac developers working on Mac software. Then there are countless smaller developers producing software for Mac OS X. (See links below for an idea of the range)