WP-Polls plugin by GamerZ is extremely customizable via templates and css styles and there are tons of options for you to choose to ensure that WP-Polls runs the way you wanted. It now supports multiple selection of answers.
Features:
Adds an AJAX poll system to your WordPress blog. You can easily include a poll into your WordPress’s blog post/page. WP-Polls is extremely customizable via templates and css styles and there are tons of options for you to choose to ensure that WP-Polls runs the way you wanted. It now supports multiple selection of answers.
All the information (general, changelog, installation, upgrade, usage) you need about this plugin can be found at: http://lesterchan.net/wordpress/readme/wp-polls.html