Colegas:
Encontré un sistema muy completo, se llama
X-Poll, que era precisamente lo que andaba buscando:
X-Poll Version 2.0 allows you to create polls with unlimited options which have their own start and expiry dates. You can choose whether to protect your poll with IP and/or Cookie protection. You can even choose how often users can vote on your poll. New with V2.0 is the ability to choose the bars which represent the polls options when the polls results are viewed. The admin area allows you to Add/Edit/Delete/View polls with ease. New with V2.0 is the IP Blocker. A sophisticated way to block certain users from voting on polls of your choosing by blocking their IP Address. Another new feature is the image uploader. You can now upload images to be used in the results graph for your polls. Version 2.25 builds upon version 2.0 by adding even more poll options such as preventing the user from seeing results, so polls can be kept private. Also, an archive page has been created so users can look at previous polls.
Puedes descargarlo con un gestor desde el enlace siguiente:
http://members.lycos.co.uk/xscripts03/xpoll.zip
Si la descarga falla, entonces solamente desde
http://members.lycos.co.uk/xscripts03/
Espero les sirva
Saludos.
www.cgsat.net