Ableton
Ableton live is a complete music solution for mac os and windows. live covers the entire musical process, from inspiration to studio to stage. create. produce. perform.
http://www.ableton.com/
Celemony
Celemony
http://www.celemony.com/
DigiDesign
DigiDesign
http://www.digidesign.com/
Fruityloops
Fruityloops
http://www.flstudio.com/
Giga Studio (tascam)
Giga Studio (tascam)
http://www.nemesysmusic.com/index.php
Propellerheads
Propellerheads
http://www.propellerheads.se/
Renoise
Streamline your workflow. produce quality music fast with renoise.
http://www.renoise.com/
Samplitude (magix)
Samplitude (magix)
http://www.samplitude.com/
Sonic Foundry
Sonic foundry is the creator of mediasite, the leading web communications and content management system for lecture capture, event webcasting and online knowledgement management.
http://www.sonicfoundry.com/
Steinberg
Steinberg,steinberg is known the world over for its professional media solutions. the company has been developing, manufacturing and selling software products for musicians and producers in the music, film, post production, and multimedia industries since 1984. steinberg products are used by grammy® and oscar® award winning composers, engineers, and producers.
http://www.steinberg.net/en/