Add Grafana.

A Graphite & InfluxDB Dashboard and Graph Editor.

README.md

@@ -181,6 +181,7 @@ A curated list of amazingly awesome open source sysadmin resources inspired by [
 * [InfluxDB](http://influxdb.com/) - Open source distributed time series database with no external dependencies.
 * [RRDtool](http://oss.oetiker.ch/rrdtool/) - Open source industry standard, high performance data logging and graphing system for time series data.
 * [Statsd](https://github.com/etsy/statsd/) - Application statistic listener.
+* [Grafana](http://grafana.org/) - A Graphite & InfluxDB Dashboard and Graph Editor.
 
 ## Network Configuration Management
 *Network configuration management tools.*