iSpring Free - iSpring Free is a free eLearning authoring tool that allows you to create responsive courses and quizzes right in PowerPoint and convert them to HTML5 or SCORM.
iSpring Convert - Convert PowerPoint to HTML5 and MP4 video
E.M. PowerPoint Video Converter - E.M. PowerPoint Video Converter is an all-in-one PowerPoint to video converter.
Online Convert PPTX to MP4 - Online Convert allows you to convert any Microsoft PowerPoint 2007 PPTX file to MP4 easily.
FlashPoint - Create professional-look flash presentations and e-learning courses with PowerPoint knowledge.
PPTX to Video - PPTX to Video is a simple but powerful mobile application that lets you convert a PowerPoint file to MP4 and play it on any video player.