Looking for a ping plotting tool for *nix

[dani-post () roisman com]

Hey folks.

I'm searching for a tool that will continuously (once per second or .5 second) ping every hop on a specified path (or 
ping a list of hosts) and somehow plot/graph/track packet loss and latency/jitter.

Looking for something that can run as a service on Unix, and can do some easy reporting in a tabular or graph form.

Thanks for the input.

- Dani