The reverse beacon network (RBN, http://www.reversebeacon.net/) is a network of software-connected radio receivers which log any activity they can find on the amateur radio bands. It is an easy way to find new stations to work or to check if your signal is coming through.
This app makes realtime RBN data available to your Android device. It is possible to filter on bands, modes (CW, PSK, RTTY) and speeds (BPS and WPM).