SmokePing keeps track of your network latency:
- Best of breed latency visualisation
- Interactive graph explorer
- Wide range of latency measurment plugins
- Master/Slave System for distributed measurement
- Highly configurable alerting system
- Live Latency Charts with the most 'interesting' graphs
- Free and OpenSource Software written in Perl written by Tobi Oetiker, the creator of MRTG and RRDtool
http://oss.oetiker.ch/smokeping/
