www.strawpoll.org.uk

Yes.

Your vote is totally anonymous.  In addition to this, your IP address and (where registered) your user identity cannot be seen by poll creators (or anyone else).

In the case of a pre-registration vote (which will only be available to a set electorate) it's only logged that you 'have' voted, not 'how'.  This is simply to prevent multiple voting and is not made available to poll creators.