Online Convert PPTX to MP4 - Online Convert allows you to convert any Microsoft PowerPoint 2007 PPTX file to MP4 easily.
PTE AV Studio - Create photo and video slideshows with effects and styles.
iSpring Convert - Convert PowerPoint to HTML5 and MP4 video
ProShow - ProShow is a dedicated tool for creating slide shows from your photos, video and music.
Converter365 Convert PPT to MP4 - Converter365 is an online freeware converter tool that enables you to convert PPT to MP4 with great ease.
Imagination - Imagination is a lightweight and simple DVD slide show maker for GNU/Linux.