In this chapter we describe the “eFood-Coop” software system that supports an eco-community in ordering, purchasing and delivering organic products such as food, clean construction material and so forth. In addition, offering services and hiring or lending goods such as tools and so forth can be supported. Besides presenting products, the software supports communication and co-operation among the members/consumers. This promotes a sustainable economy locally and makes it possible to order organic food at wholesale (which requires collecting single orders to exceed the minimum order quantities required to obtain wholesale sales units). Thus, it is one essential contribution to a decentralised eco-village structure, where several hundred people consider themselves as inhabitants of a virtual village. This village is spread over a limited area with a diameter of about 20-30 miles. The local restriction is necessary because otherwise material flows would be too extensive and maintaining social bindings would be more difficult.