PowerPoint- Microsoft Office software for creating and sharing presentations.
KeyNote- Apple iWork software for creating and sharing presentations.
UCI Replay- UCI sponsored service to capture and share audio and screen for instrucation or presentations.
Impress- Open-source software available in several versions (Open Office, NeoOffice, etc.) for creating and sharing presentations.
Prezi- Unique online presentation creation and sharing system with easy image and video handling. Basic features and public sharing are free
Pachyderm- Uses forms and templates to create presentations with minimal work. Intended for institutional use; requires local server and configuration support. Free to New Media Consortium members; available for a cost to others.
Slideshare- Free web-based service that allows uploading and sharing of presentation slides and audio. Includes tool to sync audio with individual slides. Has also social features allowing users to follow and comment on favorite presenters, topics, etc.
Authorstream- Free web-based service that allows uploading and sharing of presentation slides and audio. Includes PresentLive feature that lets viewers follow and chat about your live presentations on their own computer.
The following document provides an extensive overview of presentation tools including a descriptions of who can use each tool, and why you might want to use them, the document also includes the pros and cons for each for each tool.