Good Gear Guide
In Pictures: 21 awesome GPS and location-aware app...
GPS Status & Toolbox
True GPS geeks will appreciate the power of GPS Status & Toolbox, which helps you get the most out of your phone's GPS function by allowing you to see its raw GPS data.
You can view the position and signal strength of satellites, as well as the accuracy, speed and other details.
In Pictures: 21 awesome GPS and location-aware apps for Android