Virtins Sound Card Spectrum Analyzer
Virtins Sound Card Spectrum Analyzer is a powerful PC based virtual instrument. It consists of a sound card real time oscilloscope and a sound card real time spectrum analyzer and can run them concurrently. Unlike most of the sound card oscilloscopes in the market which search trigger event... The dual-channel Spectrum Analyzer provides four types of views: (1) Real time Amplitude Spectrum display. ... As a result, Virtins Sound Card Spectrum Analyzer boasts a very fast screen refresh rate (typically 50 frame per second) and thus a truly real time response.
http://www.virtins.com/ScspecSetup.exe - 5Mb - Download - Screenshot

Virtins Pocket Spectrum Analyzer
Virtins Pocket Spectrum Analyzer is a powerful Pocket PC based virtual instrument. It consists of a real time oscilloscope and a real time spectrum analyzer and can run them concurrently. Unlike most of the sound card oscilloscopes in the market which search trigger event after data collection,... The dual-channel Spectrum Analyzer provides four types of views: (1) Real time Amplitude Spectrum display. ... As a result, Virtins Pocket Spectrum Analyzer boasts a very fast screen refresh rate and thus a truly real time response.
http://www.virtins.com/PocketSPECSetup.exe - 293Kb - Download - Screenshot

32-bit AudioPlus
"AudioPLUS" is an easy-to-use and greatly looking MP3 Player aimed to playback audio files in the following formats: *. MP3, *. MP2, *. WAV, *. L3, *. L2 and *. ATX. Plus, it supports playlist files. It consists of three components: File Player, Equalizer (Graphic Equalizer - Spectrum Analyzer)... Spectrum analyzer allows you to choose the desired type of the spectrogram (3D-Spectrogram is also available! ... 10-band Equalizer makes it possible to obtain really perfect sound. ... ) for visual monitoring of the actual sound signal you hear.
http://www.yukudr.com/software/setup.exe - 1Mb - Download - Screenshot

DSSF3 Light
DSSF3 Light is a highly advanced sound analyzer greatly exceeding the usual FFT analyzer's performance. It is the best choice for learning sound measurement and for education. It is mainly applicable to a measurement of home audio and a car stereo, for a measurement of an electric circuit, and... DSSF3 Light is equipped with the latest functions of the realtime analyzer, such as the signal generator, the FFT analyzer (Power spectrum, 1/1 and 1/3 octave band analysis, and Waterfall), the sound level meter (slow / fast preset), the oscilloscope, the sound recorder.
http://www.ymec.com/dl/audio/PCAE3.exe - 3Mb - Download - Screenshot

RAL / Realtime Analyzer Light
This is the latest version as of January 2003. This version program includes all features the DSSF3 has as of January 30, 2003. (The DSSF3 is our best sound measurement/analysis software and has been frequently updated. )Quality sound measurement software equivalent to at least US$10,000 hardware. ... It has the signal generator and FFT analyzer for supervising distortion of the frequency characteristic, a S/N ratio, and a volume level. ... The software license of RAL costs just US$24, but RAL is more functional than the usual FFT analyzer.
http://www.ymec.com/dl/audio/PcAudioLTEMe.exe - 4Mb - Download - Screenshot

OscilloMeter - Spectrum Analyzer
Oscillometer is intended for real-time investigation of data accepted from sound card or other ADC you will want. Oscillometer consists of an oscilloscope and FFT spectrum analyzer. Maximum numbers of channels, sampling frequency, bit rate of data, frequencies range, precision are limited only... Synchronization of the spectrum analyzer is independent from oscilloscope. ... Spectrum analysis frequency resolution is up to 524288 bins. ... Spectral analyzer works on algorithm of Fast Fourier transform (FFT).
http://shmelyoff.nm.ru/oscillometersz.exe - 448Kb - Download - Screenshot

Virtins Sound Card MultiInstrument
Virtins Sound Card MultiInstrument is a powerful PC based virtual instrument software. It consists of a sound card real time oscilloscope, a sound card real time spectrum analyzer and a sound card signal generator, and can run them simultaneously. Unlike most of the sound card oscilloscopes in... Virtins Sound Card MultiInstrument provides a comprehensive range of functions including wave form addition, wave form subtraction, Lissajous Pattern display, transient signal recording, RMS amplitude spectrum display, Relative amplitude spectrum display, octave analysis, distortion analysis,...
http://www.virtins.com/SCMISetup.exe - 5Mb - Download - Screenshot

Spectrum Analyzer pro Live
Correlation Meter (giving you information about the the mono compatibility of a stereo and a Surround signal) you also can make easily Phase Check with this tool... Displaying in 1/3, 1/6, 1/12, 1/24 Octave frequency displayinge and FFT (2048 Bands) Decay settings (Display speed) for the... So you can analyze the input for Alesis ADAT, 8 Track Recording and any Multi Channel recordings... ... Switch between 4 Stereo Devices easily with the Keys. ... Multi Mode Support.
http://www.pas-products.com/bin/analive.exe - 6Mb - Download - Screenshot

Virtins Pocket Instrument
Virtins Pocket Instrument is a powerful Pocket PC based virtual instrument software. It consists of a real time oscilloscope, a real time spectrum analyzer and a signal generator, and can run them simultaneously. Unlike most of the sound card oscilloscopes in the market which search trigger... Virtins Pocket Instrument provides a comprehensive range of functions including wave form addition, wave form subtraction, Lissajous Pattern display, transient signal recording, RMS amplitude spectrum display, Relative amplitude spectrum display, phase spectrum display, auto correlation coefficient...
http://www.virtins.com/PocketINSSetup.exe - 1Mb - Download - Screenshot

CoolCD Studio
A full-featured AudioCD player with a stylish digital graphical interface. Offers all the things you would expect from a CD player plus many extra features: full CDDB support (downloads, submits, jobs caching and queuing), direct/fast track access to CD features, an advanced sound visualization...
http://www.gracebyte.com/coolcd/files/coolcd.zip - 1Mb - Download - Screenshot