Not graphs as in charts, but as to graph all the metrics, stats and events of a running Django site.

Nice library with some pre-defined measurements:

• http://django-statsd.readthedocs.org/

Hosted backends:

• http://www.stathat.com/
• https://metrics.librato.com/
• http://www.datadoghq.com/
• https://keen.io/
• https://www.hostedgraphite.com/
• http://ducksboard.com/