Organs
Ahlborn http://www.ahlbornorgans.com/
Allen http://www.allenorgan.com/
Das Deutsche Analog-Orgel Forum http://www.analogorgel.de
Benedikt http://www.benedikt-orgel.de
Britson http://www.britson.com/
Classic orgenbuilders http://www.classicorgan.com
Compton http://www.comptonorgans.com
Cantor http://www.cantor-organs.demon.nl
Content http://www.content-organs.com/
Copeman Hart http://www.copemanhart.co.uk/
Organsound Archieve http://www.organsoundarchive.com/
Heyligers http://heyligers-orgels.nl.
Johannus http://www.johannus.com/
Kisselbach http://www.kisselbach.de
Makin http://www.makinorgans.co.uk/
Phoenix http://www.phoenixorgans.com/
Van der Poel http://www.vanderpoelkerkorgels.nl/
Rodgers http://www.rodgerscorp.com/
Veritas http://www.veritasorgans.com
Wyvern http://www.wyvernorgans.co.uk
Vox Coelestis http://vox-coelestis.at

Samples
aH Virtual Pipe Organs http://www.solcon.nl/ahoogendijk/ (Digital samples)
GENeral Purpose Organ (GENPO) http://genpo.sourceforge.net
Hauptwerk http://www.organassist.com
http://hauptwerk.co.uk
http://www.crumhorn-labs.com
Jorgan http://jorgan.sourceforge.net
Sound-research http://www.sound-research.net
Ucapps.de/ http://www.ucapps.de
European Virtual Historical Pipe Organ Project http://www.organartmedia.com
Sonus Paradisi - Virtual Pipe Organ Project http://www.sonusparadisi.cz
Milan Digital Audio http://www.milandigitalaudio.com
http://habanerosoftware.com/midiorgan/
Virtual Theatre Organ http://www.virtualorgan.com
Silver Octopus Studio http://silveroctopus.co.uk
GENPO http://genpo.sourceforge.net
Forum Hauptwerk http://hauptwerk.seeyoo.net
Orgelbits -  Eine Informationsplattform für die virtuelle Orgel http://www.orgelbits.de