OctoPerf - OctoPerf is a SaaS load testing solution, based on JMeter.
GPS Status & Toolbox - Display your GPS and sensor data: Shows the position, number and signal strength of GPS satellites.
StresStimulus - Load testing tool for websites and mobile that works with hard-to-test applications.
VisualGPSView - VisualGPSView incorporates many advanced features found in professional programs.
SmartMeter.io - Performance Testing with Enterprise-Level Features with a familiar jMeter interface
RTKLIB - An Open Source Program Package for GNSS Positioning