NVDA free screen reader:
www.nvda-project.org
MIDIMag is an e-mail distribution list for blind musicians:
www.midimag.org
Captek (formerly Science Products for the Blind) distributes specialized measurement and sensing devices for the blind:
www.captek.net
The phone numbers for Captek are: 800-888-7400 or 610-296-2111
AUD A LEVEL (MODELS 1102 & 1100): Audible recording level meters
The AbleData web site is also another useful resource for obtaining specialized equipment:
www.abledata.com