diff --git a/README.md b/README.md
index 894055c..8fedf77 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,24 @@
 IPython notebook extensions
 ===========================
-The IPython notebook allows extending the html frontend functionality (i.e. what you do in the Browser) using extensions written in Javascript. This repository contains a collection of such extensions. The maturity of the provided extensions may vary, please create an issue if you encounter any problems.
+This repository contains a collection of extensions that add functionality to the IPython notebook.
+These extensions are mostly written in Javascript and will be loaded locally in your Browser.
 
+The maturity of the provided extensions may vary, please create an issue if you encounter any problems.
+
+Overview
+===========================
+The repository is organized in different categories: 
+
+| Name | Description |
+|------------|-------------|
+| usability  | Additional functionality for the notebook            |
+| publishing | Getting your notebooks out into the wild             |
+| styling    | Styling schemes for different looks of the notebook  |
+| slidemode  | Slideshow creation for usw with reveal.js            |
+| testing    | Extensions in a early stage                          |
+
+ 
 Documentation
 =============
 The extensions are documented in the Wiki. Please take a look [here](https://github.com/ipython-contrib/IPython-notebook-extensions/wiki)
-