Update README.md

README.md

@@ -4,6 +4,12 @@
 
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/git/https%3A%2F%2Fgitlab.enpc.fr%2Fnavier-fenics%2Ffenics-binder/HEAD?urlpath=lab)
 
+## Contents
+
+* JupyterLab interface
+* [Gmsh](http://gmsh.info/) (version 4) for external meshing
+* `meshio` package for mesh conversion
+
 ## Contact
 
 **Jeremy Bleyer** (jeremy.bleyer@enpc.fr)