overtone analyzer

internet sharing (router) and firewall software, firewall Analyzer software

Freeware blood pressure recorder and analyzer for home use.

Free internet connection tester, statistical analyzer and real time speed data

Network Sniffer is a Windows based Packet sniffer an Network analyzer

Connection-oriented packet sniffer and protocol analyzer.

Professional quality signal analyzer, 1/3 octave RTA, signal generator.

Spectra1 is a stand-alone real-time spectrum analyzer.

A spectrum analyzer for the professional audio engineer or hi-fi enthusiast.

Real-time Sound Card based Oscilloscope,Spectrum Analyzer,Signal Generator

Packet analyzer with HTTP file capture and a neat Graphical Packets Mode. Free.