Impress is a truly outstanding tool for creating effective multimedia presentations. Does linear or non-linear presentations with the included Presenter Console extension. Your presentations can be enhanced with 2D and 3D clip art, special effects and transition styles...
Microsoft PowerPoint, part of the Microsoft Office Suite , enables users to create high-impact, dynamic presentations, while integrating workflow and ways to easily share information.
Prezi allows anyone who can sketch an idea on a napkin to create and perform stunning non-linear presentations with relations, zooming into details, and adjusting to the time left without the need to skip slides.
Google Slides, part of Google Drive , is an online presentations app that allows you to show off your work in a visual way. Here's what you can do with Google Slides:
Easily create gorgeous presentations with Keynote, featuring powerful yet easy-to-use tools and dazzling effects that will make you a very hard act to follow.
HackMD is a browser-based, real-time collaborative markdown editor. It was inspired by hackpad but focuses more on speed and flexibility.