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Touchstone Mobile — RF Spectrum Analyzer Software
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How to Make a $19 Police Radio Scanner : 22 Steps - Instructables
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Win500: WS1040, WS1065, PSR-500, PSR-600, PRO-651, PRO-652, PRO-106, PRO-197, PSR-310, PSR-410 Scanner Software for Data Management, Monitoring, and Control
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Petter Reinholdtsen: rtlsdr-scanner, software defined radio frequency scanner for Linux - nice free software