✨ Add SliDesk (#78)

Author: gouz

README.md

@@ -159,6 +159,7 @@ Community-sourced tools for the DevRel industry. Brought to you by [The DevRel C
 * [slides.com](https://slides.com/): Make better presentations. Slides is a place for creating, presenting and sharing slide decks.
 * [deckdeckgo.com](https://deckdeckgo.com/): Create presentations that work as standalone apps at any device, everywhere ([see example video](https://www.youtube.com/watch?v=3o3oGBTTRSs))
 * [Slidev](https://sli.dev/): Slidev aims to provide the flexibility and interactivity for developers to make their presentations even more interesting, expressive, and attractive by using the tools and technologies they are already familiar with.
+* [SliDesk](https://slidesk.github.io/slidesk-doc/): SliDesk allows you to focus on your content. You write your slides with MarkDown. An ecosystem exists for components and plugins.
 
 ## Real time interactions
 * [kahoot.com](https://kahoot.com/): Game-based platform that makes learning awesome for millions of people all over the world. **Useful for real time surveys**