Zeta Centauri, Inc.
Allows you to use the mouse and computer keyboard to play external MIDI devices.
A four-deck digital audio mixing tool especially devised for professional DJs.
Elastique Pitch is a shifting solution for RTAS, VST, AU and AAX.
Centroplan specialises in medium to large-scale solar power systems.
BestPractice gives you complete control over mp3 and wav files.
This is a full-featured DJ and beat-mixing system to rock your parties.
TFM Group 
FREE RealTime MP3 Mixing Machine with Pitch control,CrossFade control and more.
This program can remote control Spotify from anywhere in your house.
WinCD is an audio-player (plays CDs, MP3s, WAVs,WMAs & Oggs) with pitch control.
Spotify Control lets you control the official Spotify program on your computer.
Independently take control of the time, the pitch, and the sample rate of audio.
Pitch Train is for learning perfect pitch. The user selects notes to be used for quizzing, and Pitch....
It is a Spotify addon that automatically finds lyrics for your Spotify music.
TuneFab Software Inc
Download Spotify Music to MP3/M4A/WAV/FLAC with Spotify Music Converter.
Mu-tech Co., LTD
It checks your ability of hearing high pitch sound and low pitch sound.
Pitch Pipe Products
The Pitch Pipe Bagpipe Tuner is real-time pitch detection tuning app.