SmokePing keeps track of your network latency:
If you have questions regading setup and usage of SmokePing, make sure to checkout the FAQ and if you can't find your answer there, subscribe to the SmokePing mailing list to get in touch with other users.
Upcoming Version 3
Work has started on making SmokePing work with Extopus as a frontend. This work has been commissioned by CatchPoint. SmokePing version 3 will use Extopus as its front end and focus its own activity on organizing the data acquisition. SmokePing 3 development is happening on GitHub.