Pollit.com
From it's name you can gather that Pollit.Com provides free online polls for your website. But it isn't only that! You can have other services such as an Ad Rotator script that helps you serve advertising banners in your site, guestbooks where your visitors can leave their messages, counters for giving you the number of visitors to your site, and more! Coolay has been using their services for a while now and so far the service has always been great, especially the administrator control panel.