Just because people never seem to mention it, I will also throw in a good word for Rudix. From their project page (<a href="http://rudix.org/" rel="nofollow">http://rudix.org/</a>):<p><i>Rudix features a world class collection of pre-compiled and ready to use Unix compatible software which are not available from a fresh installation of Mac OS X but are popular among other Unix environments. Here you can find utilities, programming languages, libraries and tools delivered as standard Mac OS X packages.</i><p>The packages are pre-compiled dmgs, easily downloaded and installed, or you can download the whole suite if you prefer.<p>The nice thing here is that if you <i>only</i> want coreutils and you don't want to install Xcode to get gcc, you don't have to.