Sound Cards

Audiotrak
Manufacturers of PCI (Prodigy range) and USB based sound cards. Includes support forums and driver/manual downloads.
http://www.audiotrak.net/

Creative Technology Ltd.
Manufactures PC entertainment products with a focus on sound cards, including Sound Blaster.
http://www.creative.com/

Digital Audio Labs
Sells products that offer a wide range of hardware-based solutions for PCs, used primarily by professional sound recording organizations and individuals.
http://www.digitalaudio.com/

Echo Audio
Designs and manufactures DSP based audio software and hardware.
http://www.echoaudio.com/

Ego Systems
Manufactures desktop media production hardware and software.
http://www.esi-pro.com/

ESS Technology, Inc.
PC audio solutions based on the ESS chip platform.
http://www.esstech.com/

Lynx Studio Technology, Inc.
Designs and manufactures professional, computer related audio products.
http://www.lynxstudio.com

The PC Technology Guide
Features and components of a modern PC sound card. Includes graphics, diagrams and an integrated glossary.
http://www.pctechguide.com/44SoundCards.htm

Timur Tabi's Crystal Semiconductor and OS/2
Information and opinions regarding Crystal Semiconductor chips for OEM sound cards.
http://www.tabi.org/timur/crystalos2.html

VideoLogic Online
Manufacture of sound cards and graphic cards.
http://www.videologic.com/