WCS

WCS is an application that helps you to polar align your mount using the drift alignment method with CCD or webcam support.

It supports any cam which can be installed as a Windows device (Meade LPI, ToUcam, NexImage, etc). There's also a version available for the Meade DSI cameras. The error in polar azimuth and polar elevation can be adjusted very quickly, even if Polaris is not visible.