Graphite

Graphite is an Open Source application, developed by Orbitz, for monitoring various computer systems. Available as an Open Source application since 2008, the tool stores and clearly presents time-related data.

The application consists of 3 main components:

Carbon, a monitoring daemon for time-related data,
Whisper, comparable to a database with RRDtool,
The Graphite web app, a Django frontend for the clear presentation of the created graphs and data pools.