Blush: Illustrations for everyone
Cleaver
Marp - Markdown Presentation Writer
Remark
Genial.ly - Logiciel de création de contenus interactifs géniaux
PowToon : Online business presentation software to create free, cool, animated, powerpoint video alternatives
Speaker Deck - Share Presentations without the Mess
Canva - Amazingly Simple Graphic Design Software
Presentation Software | Online Presentation Tools | Web Presentations | SlideRocket
SliderWall : jQuery slider, image slider, content slider, header rotator
Screencast-O-Matic
Gliffy.com - Diagram and draw in your web browser