The DataGrapher is a Webfrontend for the RRDtool from Tobias Oetiker. Maintask is the simple creation of combined Graphs, which could be dynamic created or modified. You could simply add Devices, which will be ask automatically in fixed time ranges. The collected data, which will be collected via SNMP from the devices, will be saved in the Round Robin Database (RRD). From the Devices you could easy choose which SNMP data should be collected from an index and from that selection you could easy create a multi Graph, with some choosen graphs inside. You could easy change the color, line, font, background and so on in your graphs.
There is also an API for the DataGrapher. You could control DataGrapher with that API (without the Webgui).
DataGrapher is written entirely in Perl and is distributed under the GNU General Public License.
The DataGrapher Project Page on Sourceforge. We thank Sourceforge for support and the nice platform we could use for free.