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.
Online Convert PPTX to MP4 - Online Convert allows you to convert any Microsoft PowerPoint 2007 PPTX file to MP4 easily.
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.
iSpring Convert - Convert PowerPoint to HTML5 and MP4 video