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 ## Metric & Metric Collection
 *Metric gathering and display software.*
 
+### Collectors only
+* [Diamond](https://github.com/BrightcoveOS/Diamond) - Python based statistic collection daemon.
 * [Collectd](http://collectd.org/) - System statistic collection daemon.
 * [Collectl](http://collectl.sourceforge.net/) - High precision system performance metrics collecting tool.
-* [Dashing](http://dashing.io/) - Ruby gem that allows for rapid statistical dashboard development. An all HTML5 approach allows for big screen displays in data centers or conference rooms.
-* [Diamond](https://github.com/BrightcoveOS/Diamond) - Python based statistic collection daemon.
-* [Facette](http://facette.io) - Time series data visualization and graphing software written in Go.
-* [Freeboard](https://github.com/Freeboard/freeboard) - A damn-sexy front-end real-time dashboard. Transforms raw JSON into delicious UI.
-* [Ganglia](http://ganglia.sourceforge.net/) - High performance, scalable RRD based monitoring for grids and/or clusters of servers. Compatible with Graphite using a single collection process.
-* [Grafana](http://grafana.org/) - A Graphite & InfluxDB Dashboard and Graph Editor.
-* [Graphite](http://graphite.readthedocs.org/en/latest/) - Scalable graphing server.
-* [InfluxDB](http://influxdb.com/) - Distributed time series database with no external dependencies.
-* [KairosDB](https://code.google.com/p/kairosdb/) - Fast distributed scalable time series database, fork of OpenTSDB 1.x.
-* [OpenTSDB](http://opentsdb.net/) - Store and server massive amounts of time series data without losing granularity.
-* [Packetbeat](http://packetbeat.com/) - Captures network traffic and displays it in a custom Kibana dashboard for easy viewing.
-* [Prometheus](http://prometheus.io/) - Service monitoring system and time series database.
-* [RRDtool](http://oss.oetiker.ch/rrdtool/) - Industry standard, high performance data logging and graphing system for time series data.
 * [Statsd](https://github.com/etsy/statsd/) - Application statistic listener.
+* [tcollector](http://opentsdb.net/docs/build/html/user_guide/utilities/tcollector.html) - System statistic collection daemon written in Python for OpenTSDB
+
+### Dashboards
+* [Grafana](http://grafana.org/) - A Graphite & InfluxDB Dashboard and Graph Editor.
+* [Ganglia](http://ganglia.sourceforge.net/) - High performance, scalable RRD based monitoring for grids and/or clusters of servers. Compatible with Graphite using a single collection process.
+* [RRDtool](http://oss.oetiker.ch/rrdtool/) - Industry standard, high performance data logging and graphing system for time series data.
+* [Dashing](http://dashing.io/) - Ruby gem that allows for rapid statistical dashboard development. An all HTML5 approach allows for big screen displays in data centers or conference rooms.
+* [Facette](http://facette.io) - Time series data visualization and graphing software written in Go.
+* [Freeboard](https://github.com/Freeboard/freeboard) - A damn-sexy front-end real-time dashboard for the internet of things. Transforms raw JSON into delicious UI.
+
+### Metric storage
+* [OpenTSDB](http://opentsdb.net/) - Store and server massive amounts of time series data without losing granularity.
+* [KairosDB](https://code.google.com/p/kairosdb/) - Fast distributed scalable time series database, fork of OpenTSDB 1.x.
+* [InfluxDB](http://influxdb.com/) - Distributed time series database with no external dependencies.
+
+### Packages
+* [Prometheus](http://prometheus.io/) - Service monitoring system and time series database.
+* [Packetbeat](http://packetbeat.com/) - Captures network traffic and displays it in a custom Kibana dashboard for easy viewing.
+* [Graphite](http://graphite.readthedocs.org/en/latest/) - Scalable graphing server.
+
 
 ## Network Configuration Management
 *Network configuration management tools.*