Keynote is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux alternative is LibreOffice - Impress, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Keynote and many of them are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Keynote are OpenBoard Whiteboard, Sozi, LaTeX Beamer and Prosper and Calligra Stage.
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...
OpenBoard is a cross-platform (Linux / Windows / macOS) interactive whiteboard application. It is currently maintained by the Education Department (DIP) of the Canton of Geneva in Switzerland.
Sozi is an open-source browser-based presentation software using SVG and JavaScript to play animated presentations.
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.
Calligra Stage is an easy to use yet still flexible presentation application. You can easily create presentations containing a rich variety of elements, from graphics to text, from charts to images.
WPS Presentation, part of WPS Office , is a sophisticated slide show application that is highly compatible with Microsoft PowerPoint . You’re able to open, edit, and save .ppt, .pptx, and .
Impress, part of the Apache OpenOffice suite, is a presentation program similar to Microsoft PowerPoint . It does dual screen and linear presentations out of the box, but the free "Presenter Console"...
SoftMaker Presentations is a Microsoft Powerpoint-compatible presentation-graphics software, part of SoftMaker FreeOffice , that makes creating stunning presentations a snap.
DeckDeckGo aims to be the open source web editor for presentations. Every presentation made with DeckDeckGo is a standalone Progressive Web App with accessible remote control.
Aspose.Slides for Cloud is a REST based API that allows developers to read, write & modify a PowerPoint presentations in cloud. It is platform independent API & can be used by developers in web, desktop, mobile & cloud applications alike.
Creedoo is an cloud based interactive presentation tool with integration to slideshare, powerpoint, google, flickr. it allows to create presentations pretty fast and to use html elements in the slides (web sites, polls and interaction with audience).
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The sad part about Apple's productivity app is their natural restriction to the platform. Beyond that LibreOffice probably is the best choice available.