Makes audio utilities progams

Virtual instruments and VST plugins for Windows

Robin Schmidt's Music Engineering Tools. Plug-in manufacturer.

SynthFont - MIDI rendering tool using SoundFonts

LMMS is a free cross-platform alternative to commercial programs like FL Studio®, which allow you to produce music with your computer.

Makes audio software.

Klanghelm is a Berlin, Germany based software company specialized in creating audio plugins and standalone audio applications. Klangshelm plugins support both windows and mac platform and both 32-Bits and 64-Bits operating systems.

Makes free VSTi : NN29 and eGGsYNTH1,

Makes analog virtual synthesizers as VST intruments for quality sound recording and music making.

Christian Schüler is a game programmer and has serveral years of experience at developing 3D game engines. He is also a hobby musician, so it came naturally to leverage his programming expertise to create music software. He is now author of a commercial audio effects software - AriesVerb.