NOTION - Music composition and performance software with the most intuitive composition interface and most realistic playback

Manufacrurer of Virtual Composer, a MIDI editor working with Quicktime.

Shareware developper (iTunes Catalog)

Sony Media Software is a leader in professional audio and video editing solution, producing software titles such as the industry-leading ACID, Sound Forge, Vegas 6.0, CD Architect, PSP Media Manager, Loops for ACID, and Noise Reduction.

Makes a Sample editor

Electrotap L.L.C. is a partnership founded for the purpose of developing and distributing the tools to create innovative music and art. Developper of Jade, software environment for managing interactive performances.

Spongefork is a small software company dedicated to creating innovative tools for music and media manipulation. After its release in 1999, their namesake application, Spongefork, quickly became a well known tool for creative sound processing and live improvisation. With the recent release of Spongefork 2, they're now back on track actively developing for Mac OS X. SF was founded by programmer/musician Ryan Francesconi.

Cognitone introduces a new generation of intelligent software for the composition of musical scores.

Games and utilities for Mac OS, Mac OS X.

Manufacturer of utility softwares and music plug-ins: Stave jobs, IconMacher...