nukeevangelist writes:  

phpESP-clones & EdogsOpros :: survey tools for phpnuke :: from time to time we announce the latest news about the survey-module development;

phpStandalone: the phpESP v 1.8 final "PHP scripts to let non-technical users create surveys, administer surveys, gather results, view statistics. All managed online after database initialization."
based on Butterfat.net: phpESP v 1.8 final :: phpESP v 1.8 [fully blown demo]

phpESP for PHPNuke version done by Eric [nettrade.nl]. - visit his site today.

besides phpESP we have a genuine PHPNuke-module - created by edogs :: EdogsOpros v1.0.9b :: here some Demos:

a list of several surveys: pick one and have a closer look
some in depth stats of a survey [arithmetic calculations]
more stats of a survey [arithmetic calculations]
polterchrist.ent