Focusky Presentation Maker 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 Focusky Presentation Maker and 12 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to Focusky Presentation Maker are Reveal.js (Free, Open Source), Sozi (Free, Open Source), Apache OpenOffice Impress (Free, Open Source) and SlideLab (Freemium).
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.
SoftMaker Presentations is a Microsoft Powerpoint-compatible presentation-graphics software, part of SoftMaker FreeOffice , that makes creating stunning presentations a snap. It's available for free included in the FreeOffice suite.