For a lite version, this is awesome – Network Analyzer: net tools Review

This little app helps the networking novices in this world breathe a little bit easier. The FAQ section is informative, and even guides you to get apple's own app so you can better troubleshoot your wifi issues. It's nice to see a developer with scruples and actually cares about the product delivered to the public. Just having access to the help page made me buy the paid version. Thanks for making me a happy customer!
Review by Zforce75 on Network Analyzer: net tools.