Sound Generator
The audio frequency sinusoidal signal generator is intended for adjusting and measuring parameters of audio equipment. Works with 16, 24 and 32 bit sound cards at sampling rate up to 384 kHz. Independent channels frequency and amplitude controls. Adjustable phase shift between channels. ... The minimum coefficient of nonlinear and intermodulation distortion, precision, stability and range of frequency are limited only by quality of the used sound card. ... The Sweep Frequency Mode with adjustable rate in linear or logarithmic scale.
http://shmelyoff.nm.ru/sndgensz.exe - 286Kb - Download - Screenshot

Audio Multi-Tone Generator
Two-channel multi-tone audio frequency sinusoidal and noise signal generator is intended for adjusting and measuring parameters of audio equipment. Works with 16, 24 and 32 bit sound cards at sampling rate up to 384 kHz. WDM drivers support. Independent channels frequency and amplitude controls. ... The minimum coefficient of nonlinear and intermodulation distortion, precision, stability and range of frequency are limited only by quality of the used sound card. ... The Sweep Frequency Mode with adjustable rate in linear or logarithmic scale.
http://shmelyoff.nm.ru/sndgenmt.exe - 331Kb - 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... The following parameters can be measured in real time mode: Peak Frequency, Peak Amplitude, Total Power, Signal to Noise Ratio (SNR), Signal to Noise plus Distortion Ratio (SINAD), Spurious-Free Dynamic Range (SFDR), Effective Number Of Bits (ENOB), Total Harmonic Distortion (THD),...
http://shmelyoff.nm.ru/oscillometersz.exe - 448Kb - Download - Screenshot

enable Guitar Tuner
enable Guitar Tuner performs real-time tuning for a range of instruments, as well as presets for each instrument in a variety of styles. You can transpose, use common jazz and orchestra references or even enter your own custom frequencies for unlimited flexibility. ... enable Guitar Tuner automatically determines your instrument / string's current frequency to high accuracy, and tells you the corresponding musical note. ... Learn to "tune by ear" using the Play Tone feature, which generates the note you are trying to play while you tune to it.
http://www.enableencore.com/encore/GuitarTunerDemo.exe - 4Mb - Download - Screenshot

enable Encore
enable Encore performs real-time tuning for a range of instruments, as well as presets for each instrument in a variety of styles. You can transpose, use common jazz and orchestra references or even enter your own custom frequencies for unlimited flexibility. ... enable Encore comes complete with an integrated metronome - providing a range of preset speed styles (Adagio, Moderato, etc. ... enable Encore automatically determines your instrument / string's current frequency to high accuracy, and tells you the corresponding musical note.
http://www.enableencore.com/encore/EncoreDemo.exe - 4Mb - Download - Screenshot

enable TunerCE
enable TunerCE is a powerful instrument tuner which provides high precision tuning on handheld PCs. The tuner provides real-time tuning for a range of instruments, including presets for a number of string and wind instruments in a range of styles and transpositions. ... The tuner will also determine your instrument's current frequency, corresponding musical note and even octave offset to aid you in transcripting pieces you don't have sheet music for.
http://www.enablesoftware.com/TunerCE.exe - 338Kb - Download - Screenshot

The Psychedelic Screen Saver
The Psychedelic Screen Saver is a light synthesizer that generates an astounding variety of mesmerizing patterns. As the patterns materialize on your screen, the colors will shift, undulate, and blow your mind. Whether you're into abstract art, mathematics, or just have a history of mental... Fluctuations in the amplitude of the frequency will oscillate the control values within the range of effect. ... With many of the module controls you can associate a sound frequency, a range of effect, and a sensitivity.
http://www.synthesoft.com/download/psych2005.zip - 2Mb - Download - Screenshot

AudioAlchemy OGG Edition
AudioAlchemy OGG Edition is fast, easy-to-use, highly configurable, and affordable audio conversion software that provides complete control over speed, quality, bitrate, frequency, channels, etc. Convert from WAV, MP3, WMA, OGG, AIFF, AU, VOX, RAW, PCM, GSM, ADPCM, g726, g721, g723, MPC, and/or... This extensive bitrate range allows for maximum control of the conversion output. ... It can also convert existing OGG files to a different bitrate, frequency, and/or channel setting; for example, converting a 350 kbps OGG to 128 kbps for use in a hardware device that requires a specific setting...
http://www.convertmusic.com/download/setup_aa-ogg.exe - 3Mb - Download - Screenshot

The Kinemorphic 3D Screen Saver
The Kinemorphic 3D Screen Saver will animate an endless variety of spectacular 3D patterns and images. As the 3D patterns animate on your screen, the objects, images, lighting, and colors will move through, around, and on top of each other. Kinemorphics has been designed to give you an... With many of the module controls you can associate a sound frequency, a range of effect, and a sensitivity. ... Fluctuations in the amplitude of the frequency will oscillate the control values within the range of effect.
http://www.synthesoft.com/download/kine45.zip - 4Mb - Download - Screenshot

AudioAlchemy WAV Edition
AudioAlchemy WAV Edition is a fast, easy-to-use, highly configurable, and affordable audio conversion tool that provides settings for speed, quality, bits per sample, frequency, channels, and much more. Convert from WAV, MP3, WMA, OGG, AIFF, AU, VOX, RAW, PCM, GSM, ADPCM, g726, g721, g723, MPC,... It provides frequency settings ranging from 8 Hz to 48 Hz, 16-bit and 8-bit BPS, stereo and mono channels, and more. ... It can also convert existing WAV files to a different bits per sample, frequency, and/or channel setting; for example, converting a 44.
http://www.convertmusic.com/download/setup_aa-wav.exe - 3Mb - Download - Screenshot