Rudix is described as 'package-based, user-friendly way to extend the Unix portion of Mac OS X with additional network utilities, computer languages, development libraries, text tools and everything else you missed from command line' and is an app in the OS & Utilities category. There are four alternatives to Rudix for Mac, Homebrew and Linux. The best alternative is Homebrew, which is both free and Open Source. Other great apps like Rudix are Homebrew Cask (Free, Open Source), MacPorts (Free, Open Source) and Fink (Free, Open Source).
The MacPorts Project is an open-source community initiative to design an easy-to-use system for compiling, installing, and upgrading either command-line, X11 or Aqua based open-source software on the Mac OS X operating system.
What is Fink? Fink is a project that wants to bring the full world of Unix Open Source software to Darwin and Mac OS X. As a result, we have two main goals. First, to modify existing Open Source software so that it will compile and run on Mac OS X.