Fink provides hundreds of Open Source Unix tools compiled for OS X, free.

Installing Fink

For Lion (10.7), see the  Lion instructions on the Fink site. I tested these in February 2012 and they worked. Some Fink packages may not build yet; check individual packages in the database and contact the developer if necessary.

Here are instructions for setting up a 64-bit Fink on Snow Leopard, tested August 2010 with 10.6.4.

• From  http://www.finkproject.org/, choose build from source and download the source from SourceForge. Follow the instructions. (Before you start, check that /usr/bin/pod2man has x permission: one machine I tried this on blew up because pod2man was non-executable.)
• Rename /sw to something else so you can install the new one over it.
• Download 64-bit fink-0.29.9.tar.gz, extract it, run ./bootstrap, takes ~ 2 hrs.
• sudo fink selfupdate, choose rsync
• Now you can do sudo fink install xxx for all the modules you want. The ones I use are
  • antiword
  • aspell
  • aspell-en
  • bzip2 (done by base)
  • dosunix
  • imagemagick (Big. Installs ghostscript and tcltk)
  • wget
  • psutils
  • tidyp (a port of tidy)
  • rsync (newer than the one supplied with the Mac)
  • uni2ascii (Have to enable "unstable." Drags in a lot of stuff including Python.)
  This list takes about 5 hrs of compiling and wallpaper. (Do not install svn, use the one from collab.net described in the Eclipse article.)
• I may install expat and sqlite later.