Software editor of many softwares, including Cabrio a free MP3 player.

Makes virtual instruments including ManyStation, ManyGuitar, and ManyOne

AMNS makes Nightingale, a professional music notation software for Macintosh

Digital Audio Software for Windows and Mac (DirectX, Pulsar/scope, RTAS plug-ins)

Sineshine is an audio laboratory completely dedicated to innovations in sound and music. They specialize in cutting-edge sound design as well as in writing tutorial books and developing innovative synthesis/processing algorithms. Their creations can also be found in flagship synthesizers from Roland Corporation. Among others, these include the worldwide-popular sound libraries like "Planet" and "V" series for Roland synthesizers, and Transformer - the innovative synthesis/processing plugin for Mac OS X.

Editor of MyMusic, this software lets you create your own music library. MyMusic is a powerful database program designed to help you maintain an inventory of your music collection. 

Editor of several M.A.S Plug-ins, including Vintasion and Fattenizer.

Software developer for the business of Music: Music Production Deluxe, Production Label Pro 2.1, On The Road...

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

Gerzonic, home of ambisonic vst plugins