280 Slides is described as 'Create beautiful presentations, access them from anywhere, and share them with the world. With 280 Slides, there's no software to download and nothing to pay for – and when you're done building your presentation you can share it any way you like' and is an website in the Office & Productivity category. There are more than 10 alternatives to 280 Slides, not only websites but also apps for a variety of platforms, including Windows, Mac, iPad and Linux. The best alternative is LibreOffice - Impress, which is both free and Open Source. Other great sites and apps similar to 280 Slides are Microsoft Office Powerpoint (Paid), Prezi (Freemium), Google Slides (Free) and Sozi (Free, Open Source).
Imagination is a lightweight and simple DVD slide show maker for GNU/Linux. Imagination has been designed from the ground up to be fast, light and easy-to-use. It requires the ffmpeg encoder to produce the movie file and libsox to handle the audio.