EleSWR works with the Piglet and PigRemote hardware devices from Pignology to query and display the standing wave ratio (SWR) of the antenna connected to Elecraft K3 and KX3 amateur radios.
Ham Square is a free application that displays the Maidenhead Locator, or square, for your current location. This grid system is used by radio amateurs worldwide as a convenient and short way of representing and communicating a location. Details of more ham radio apps from KramStuff are at http://www.kramstuff.com
Utility for ham radio users of the WSPR beacon system. Quickly shows who can hear you and details of each spot.