Super Survey  

Super Survey lets you create surveys for your site and have your visitors fill them out. Add some interactivity to your site with surveys for fun or for research! You can create an unlimited number of surveys, and each one can have an unlimited number of questions. For each question, you specify how the answers will be presented to visitors: in a select list, as radio buttons, as check boxes, or as a text input field. Each question can have up to 10 predefined answer choices. When a user fills out a survey, their responses are tabulated and added to the database.

Hosting Requirements: Unix; PHP 4.2+
Database: MySQL
Price: $35

   I-RATER basic  

IRATER is not just a rating script, it is an entire feature rich user experience, completely customisable by you, the webmaster. IRATER basic can be used to complement your existing website or will function as a stand alone website. Payment feature that allows you the webmaster to charge a fee for people to signup and use the features of your site.

Price: $37

   SurveyMagic  

SurveyMagic is a powerful PHP application designed to generate and handle surveys, polls, sets of questions, or MCQ (multiple-choice question). With SurveyMagic, just set up a survey and its questions, choice among many widgets and input controls, publish, and get the results !

Hosting Requirements: PHP 4.1+
Database: MySQL, PostgreSQL
Price: $249

   Survey Wizard  

Survey Wizard allows you to create surveys for your site and have your visitors fill them out. You can use your surveys for fun, for serious research, or for whatever you like! Survey Wizard supports an unlimited number of surveys, each with an unlimited number of questions.

Hosting Requirements: Unix-based web server; PHP 4.2+
Database: MySQL
Price: $39.95

   Polly  

Polly is a dynamic polling system [Poll/Survey] that will create interest and let you gather valuable information about what your Site visitors think. Polly features web based administration interface.

Hosting Requirements: Unix, Windows, MacOS X
Database: MS Access
Price: $24.95

   Recount  

Recount is a polling application and library written in PHP and released under the terms of the GPL. Recount allows you to quickly and easily create and manage poll based content in any format you like. Recount has support for both MySQL and PostgreSQL.

Hosting Requirements: PHP 4.2.2+
Database: MySQL 3.23.x, PostgreSQL 7.2.x.
Price: Free

   phPollster  

phPollster is a PHP/MySQL application for conducting basic polling on a website, featuring an OO coding style with db layer, preambles, ui wrapping, multi-language support, thumbnails and images, data archiving, and admin backend.

Hosting Requirements: Unix
Database: MySQL
Price: Free (GPL)

   Tapps  

Tapps is an advanced PHP poll system with some neat features: single and multiple answers possible; optional referer check; optional IP locking; optional cookie check (including an option to force the user to accept the cookie); optional email confirmation; database backend (only MySQL at the moment); paranoiac user input validation; cares about the users privacy; admin interface for easy creation of polls.

Price: Free (GPL)

   Flipper Poll  

The main features of Flipper Poll: Unlimited Options; Used flat files, no need for a database; Easy to use.

Price: Free

   Szewo Polls  

Szewo Polls is a complete poll management system written in PHP3. Features: setup and administer polls on your websites; conduct and display polls using multiple views; view hourly, overall and summary statistics; activate and deactivate IP logging; activate and deactivate cookie protection; activate and deactivate a single poll; activate and deactivate statistics.

Price: Free