Pente is something I wrote a few years ago in Borland Pascal. When experimenting with Free Pascal (http://www.freepascal.org) a while ago, I dug up this program again, and compiled it. I was surprised to find that it compiled without even the slightest of warning.
If you're interested to try it, you can download it. Please read the README before trying.
Also, I don't provide binaries. Get the freepascal compiler, and run 'make'.