free audio DJ Mixer Studio is multitrack dj mix software with amazing remix effects, featuring Reverb, Distortion, Delay, EQ, Compressor, Flanger and Chorus, as well as resonant filters and a powerful loop editor. The high performance 32 bit sound engine supports broadcast quality WAV files and will even import compressed MP3, OGG & WMA files.
By it's enormous function range and the support of numerous media formats MEDIARevolution is the only Player you really need on your PC! Perfect for Massive Media Collections!
ClubDJ ProVJ allows you to mix video, audio, and visualizations (ambience) using a dual deck interface. It has dual display support, realtime pitch/tempo change for video and audio! It supports mpeg1, mpeg2, avi, divx, xvid, mp3, mp4, m4a, acc, ogg, wav. It is DAC-2 compatible. 
Mix MP3, WMA, WAV on 2 Virtual DJTurntables, also Dub Vocals and Record Mixes. Features 2 Virtual Turntables, Beatmatching, Scratching, Mixer, Playlist Editor, Sampler, CD Burner, CD Ripper, Recorder, Aux-In Channel, 2 Stunning Effects, Voice Over system, Media Pool, Media Search Utility, Wave Editor, Audio Clip Export, BPM Detection and much much more ... 
MagicScore Maestro 5 + WEB Publishing - professional music notation software with ability to publish "live" sheet music in Internet , offering the most advanced capabilities for working with music and provides you a possibility to imagine music piece as a whole by linking visual representation of the score in the Internet and its playback, and possibility to print the score immediately.
PianoFX Studio 4.0 from Tanseon Systems is an advanced Piano Music Keyboard Synthesizer for the Personal Computer. You can play live piano music using your PC keyboard or mouse without the requirement of a conventional Piano. The player piano music keyboard interface & piano keys has been designed to exactly resemble a fully featured Professional Keyboard Synthesizer. It produces a ultra-high quality midi sound output.
Space Flight is a musical note learning game. Its self paced learning system mixed with fun, make Space Flight an effective educatinal tool. Its simple to use. Dedicated to promoting education, it comes with a free level which never expires. Children learn best when learning is fun. Built as an arcade style game, Space Flight turns the chore of learning musical notes into an adventure.
Virtual piano, guitar/banjo/mandolin etc, hammered dulcimer simulator and note mapper lets you write & play back songs thru midi and see the notes animated on a musical staff and scale, piano keyboard, guitar/banjo/mandolin, and hammered dulcimer images. You can change the midi sound to any of 128 different instruments, and mix in external instruments from the Midi input port. You can define additional fretted and fretless instrument layouts.
