Extension:AJAXPoll

The AJAXPoll extension allows one or more AJAX-based polls on MediaWiki pages with  tag.

Configuration
If you want to disable the automatic tracking category then set the text of system message "MediaWiki:Ajaxpoll-tracking-category" in your wiki to "-" (minus).

Syntax
Question Choice 1 Choice 2 Choice 3 Choice 4

Example
Do you like this poll ? Yes, it is awesome. Yes. No, I do not like polls.

If you want this, you can allow or deny the result-viewing before voting per-poll by adding the show-results-before-voting parameter in the opening tag:   

If the first line after  is "STATS", then some statistics about the wiki and its polls will be displayed.

These statistics are not localizable and this whole feature will probably be removed (or at least refactored, but probably removed) in the future.