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http://www.gabrielweinberg.com/blog/2010/06/pickfu-review.html

PickFu review - Gabriel Weinberg's Blog

Lately I've found myself repeatedly encouraging startups to use PickFu , so I thought it's time to share that advice with a wider audience. Here's how it works. You give PickFu $5 and then they get 50 people via Mechanical Turk to do an A/B test for you in the form of a question, e.g. which page/image looks better and why?
http://wufoo.com/ The Introduction Wufoo is a web application that helps anybody build amazing online forms. When you design a form with Wufoo, it automatically builds the database, backend and scripts needed to make collecting and understanding your data easy, fast and fun. Because we host everything, all you need is your web browser and a few short minutes to build a form and start using it right away. While we've collected a few of our favorite features here, the best way to experience Wufoo is first hand.

Wufoo: Online HTML Form Builder - Contact, Survey & Payment Form

SurveyMonkey: Free online survey software & questionnaire tool

Visite virtuelle Sondages en ligne Ressources http://www.surveymonkey.com/