Pitbull PRO pro
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This is a perl based program that helps webmasters to maintain secured areas on their websites and granting permissions to visitors who have signedup. Users can create signup forms to create and manage paid membership programs. It has several advanced features for members like, receiving signup information through email, ability to login to the password protected area etc, admin features like, to manage all members, to password protect, editing email and html templates, customizable templates and more.