Free menubar tool to diagnose your Mac's wifi

Brilliant tool if you've ever struggled with the question: "How do I get my Macbook to connect to the router on a specific wifi channel"
@grmeyer Hi Greg, thanks for submitting Airtool. I'd just like to clarify Airtool is not open source (it is free though!) Also, you cannot scan or connect to Wi-Fi networks. The main purpose of the app is to enable 1-click packet captures on your Mac that you can later inspect using your favorite protocol analyzer.
Can you make the thumbnail pic on your website enlargeable? I can't read anything when it's that small.
@adriangranados got it - sorry for the confusion. Great tool! Will amend the title of the hunt accordingly.