Nyrola Observatory
http://www.ursa.fi/sirius/nytt/nytt_info.html

Integrated Scientific Imaging Systems
http://www.imagingsystems.com/

Galil Motion Control
http://www.galillmc.com/

Astro-PC
http://www.astrosurf.com/astropc/index.html

WinVNC
http://www.realvnc.com/

FocusMax - Larry Weber and Steve Brady
http://www.focusmax.org/

Horus Astronomia
http://www.horus-astronomia.it