The survey was run in my LimeSurvey instance, surveys.larjona.net. LimeSurvey its a nice free software with a lot of features. It provides a “Ranking” question type, and it was very easy for allowing people to “vote” in the Debian style (Debian uses the Condorcet method in its elections).
However, although LimeSurvey offers statistics and even graphics to show the results of many type of questions, its output for the Ranking type is not useful, so I had to export the data and use another tool to find the winner.
Export the data from LimeSurvey
First attempt, the quick and easy (and nonfree, I guess)
sort results_stretch2.csv | uniq -c > results_stretch3.csv
But where is the source code of this Condorcet tool?
Second attempt: VoteEngine, a Free Open Source Software tool made with Python
./voteengine.py <stretch.txt > winner.txt