Thousands of Unix programs are available, with more being created every day. Here are a couple of places to look.
The FreeBSD Ports Collection
This collection (www.freebsd.org/ports) offered more than 12,000 open -source applications as of early 2005. These are all Unix programs that work on a number of different Unix versions. Because the Darwin layer of Mac OS X is based largely on FreeBSD, most of these programs should work on Mac OS X.
The easiest way to install many of the FreeBSD programs (and other Unix programs) on Mac OS X is to use the Fink program (http://fink. sourceforge .net), which is covered in Chapter 13, "Installing Software from Source Code."
Mac OS X Apps
This Web site (www.macosxapps.com) provides a large and growing collection of Mac OS X applications, most of which have graphical interfaces and can be installed in a manner familiar to Mac users. Many of these programs are not "pure" Unix programs, in that they make use of proprietary Mac OS X features such as the Aqua interface. Still, many take advantage of the Unix core of Mac OS X, and so this site is a good place to explore.