Acelle is a self hosted, full-featured, easy to use Email Marketing Web Application written in PHP / Laravel 5 that lets you send high-volume marketing emails via your own server or through other email service (SMTP) providers.
Facebook Triple Viral Pro is most powerful viral application you might have come across. It utilizes social features of Facebook ie Invite and Share. That is not it, you also collect email address before giving your eBook etc.Now the app is 3 in 1
SiteCloner is a PHP script which allows you to make copies, clones or archives of any website. It does not matter whether this website is made with regular HTML files or was built using a CMS like WordPress or Joomla; SiteClones clones them all!