recommended: Sony Acid Music Studio - http://www.sonycreativesoftware.com/products/acidfamily.asp

Others:

M-Audio Session - http://www.m-audio.com/products/en_us/Session-main.html
Mackie Tracktion 3 - http://www.mackie.com/products/tracktion3
Magix Music Maker - http://www.magix.com/uk/music-maker
Steinberg Sequel - http://www.sequel-music.net

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Added on January 20, 2009, 6:41 pmsome other well-known app:

Cakewalk Sonar Producer - http://www.cakewalk.com/Products/SONAR/

Acoustical Mixcraft - http://www.acoustica.com/mixcraft/index.htm

This post has been edited by cybpsych: Jan 20 2009, 06:41 PM