The value accounting system deals with the creation and transformation of value in the context of a commons-based peer production system. It describes amalgamation of value in peer-production. At the network level, it describes transformation and flow of value. Different types of value are identified and a valuation mechanism is put in place. The value created is attributed to its creators. The Value Accouting System software is open source software and is openly available. It is currently used by Sensorica.ca and Guerrilla Translations (both listed in this directory)