pres/v/g is described as 'presentation tool for the web: present, annotate, print' and is an website in the Photos & Graphics category. There are more than 25 alternatives to pres/v/g, not only websites but also apps for a variety of platforms, including Windows, Mac, Linux and iPad. The best alternative is LibreOffice - Impress, which is both free and Open Source. Other great sites and apps similar to pres/v/g are Microsoft Office Powerpoint (Paid), Prezi (Freemium), Google Slides (Free) and Sozi (Free, Open Source).
The Focusky zooming presentation tool is a creative online presentation maker for Windows & Mac, presenting your multimedia presentation in dynamic and engaging way with zoom and slide effect. It is a better presentation ideas rather than PowerPoint alternative.
SlideDog is a multimedia presentation tool that lets you combine PowerPoint presentations, PDF files, Prezi presentations, movie clips, web pages, and more to create an innovative and seamless presentation experience.
Takes a few hours to catch on, but makes the most professionally typset documents with a large number of amazingly useful features not available from other types of presentation software. For presentations, consider the Beamer or Prosper document class.