Edison makes allows to reduce energy consumption of a PC. Proposed within the framework of Climate Savers Computing, an industrial consortium wishing to reduce CO2 emission in the IT sector, this software is free.
After installing it, the user must tell Edison the working time of his PC. Then, the software will put on standby the greediest energy components (hard disk, monitor) during non-working hours. The user can however configure the speed of standby.