Merge pull request #73 from mendix/update-readme

Update README.md

Author: wegiswes

README.md

@@ -3,6 +3,11 @@
 Mendix Atlas UI is the foundation of making beautiful apps with Mendix. For more information about the framework go to
 [here](https://atlas.mendix.com/).
 
+### Useful tools
+- [Compile SCSS to CSS with Calypso](https://docs.mendix.com/howto/front-end/calypso)
+- [Visually update the design properties for web and native](https://jeltemx.github.io/mendix-dpt/)
+- [Inspect and update styles in the Make it Native app with the React Native Debugger](https://docs.mendix.com/howto/mobile/native-debug)
+
 #### Structure
 
 Mendix is capable of creating beautiful and user-friendly UI. Our Atlas UI framework demonstrates some of its