Easy GPS Tester
Full user review
"Does what it says on the tin!"
I was having trouble getting my GPS to work - the software I was trying to use it with just kept saying that the device didn't exist. Easy GPS Tester breaks the problem down into three stages - COM port found, device found on COM port, device is a GPS. It turned out that although the COM port existed no device could be found - my serial cable was faulty. I replaced this and Easy GPS Tester found the GPS straight away and gave me all of the settings I needed to use. Very simple, but did the job.
Interface isn't the most beautiful in the world! :-)