Erick Gallesio and Manuel Serrano implemented Skribe, http://www.inria.fr/mimosa/fp/Skribe . Skribilo is based upon Skribe 1.2d and re-uses a large body of code written for Skribe by Erick and Manuel. The port to Skribe and several enhancements were implemented by Ludovic Courtès. You can contact me at `ludovic.courtes@laas.fr'.