This is the guifi.net snpservices package.

This software provides graph services in the context of the
Spontaneous Networklink Platform.

Uses nodexchange/cnml as a input format, and provides traffic and
latency/availability graphs in image format by using mrtg/rrdtool
collected history by simple HTTP URLs, therefore is easily
plugable to any web application.

WWW: http://es.wiki.guifi.net/wiki/SNPservices