appcues.com - Personalized user onboarding flows without changing any code.
inlinemanual.com - Allows you to easily create walkthroughs, on-boarding guides and manageable product documentation.
walkhub.net - Record guided tours and play them on top of websites.
nickelled.com - Easily create interactive how-to guides to ensure customer success.
tourmyapp.com - Create in-application tutorials that guide your users as they use your web application.