TestFlight - iOS beta testing on the fly.
GPS Status & Toolbox - Display your GPS and sensor data: Shows the position, number and signal strength of GPS satellites.
TestApp.io - A platform that helps both mobile app developers and owners to easily share their apps with everyone to get feedback before reaching publicly to Google and App stores.
VisualGPS - VisualGPSView is a new product that allows you to display graphically the output of your GPS...
Appforshare.io - Extended Expiry | Extended Size | Extended Storage
RTKLIB - An Open Source Program Package for GNSS Positioning