Okular - Okular is a universal document viewer based developed by KDE.
Microsoft PowerPoint Viewer - Microsoft PowerPoint Viewer is one of the powerful applications that allow you to access the familiar tools to create, edit, view, present, and share presentations in no time from any location.
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
PPTX Viewer - PPTX Viewer is one of the lightweight applications that allows you to view, create, edit and share your presentation without facing any advertisement issue.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
Aspose.Slides for Cloud - Use cURL commands to create, manipulate, merge, split & convert PPT PPTX presentations & slides to PDF, XPS, TIFF, ODP, OTP, HTML & other formats.