There are numerous version of Unix-based software.  Popular older
varients are SunOS, HP-UX, and IRIX.  Popular newer varients are Linux 
and Macintosh OSX.  There are also several interfaces such as CURSES 
and X-windows.  Some versions may require extra tools, such as Java.  

The software listed here is all Unix-based.  However not all may
work on your particular flavor of Unix.  You may have to modify the 
source code before you compile.  

As I no longer operate a Unix-based system, I am unable to confirm the 
suitability of any of this software.  Use at your own risk.