LaTeX Beamer and Prosper - LaTeX is a high-quality typesetting system; it includes features designed for the production of technical and scientific documentation.
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.
Microsoft PowerPoint - Microsoft PowerPoint empowers you to create clean slideshow presentations and intricate pitch decks and gives you a powerful presentation maker to tell your story.
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.
Apache OpenOffice Impress - Impress, part of the https://alternativeto.
GitPitch - The Markdown Presentation Service on Git