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WalkHub is a free, open-source web app which allows you to record, publish and share walkthroughs of apps, services, web tools and forms by recording your interactions.
Key features include:
"WalkHub is built by a community of documentarians that contribute and maintain Walkthrough tutorials about web pages, forms, blogs, community sites, web applications or generally anything that can be done on the Internet."
An excellent free alternative to screencast tutorials provides greater longevity and portability across sites, tools and applications.
Free to use.
Sign-up now: http://walkhub.net/
Example Walkthroughs. http://walkhub.net/public-collections
User Guide: http://walkhub.net/documentation/user-guide
Fork WalkHub on Github: https://github.com/Pronovix/WalkHub