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
Slidego - At SlideGo we regard presentation software like Powerpoint as a universal authoring tool.
Converter365 Convert PPT to MP4 - Converter365 is an online freeware converter tool that enables you to convert PPT to MP4 with great ease.
Leawo PowerPoint to Video - With Leawo PowerPoint to Video converter, you can convert PowerPoint file to video in all pop formats, like convert PowerPoint to AVI, WMV, MPEG, etc, and put PowerPoint on portable devices like iPod, iPhone, Pocket PC, PSP, etc.
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.