openZmeter (oZm) is an opensource system aimed to help people to analyze and visualize power quality and electric energy in power networks. It has been designed to comply with international standards such as IEC 61000-4-30 and EN 50160 with a very reduced form factor (just a cigarette packet!!)
oZm was born as a collaborative project between the University of Almeria UAL and the University of Granada UGR based on some strong ideas: to offer an effective tool that transparently applies advanced mathematical algorithms, to obtain accurate electrical measurements and open the system to the community to promote awareness in energy saving. Based on the aforementioned ideas and the social responsibility of the university, we feel the commitment to open this result to the community.
More information in the wiki