Quadravox, Inc. - - Specializes in stand-alone sound output systems and tools needed that support them.
Slim Devices, Inc. - - Makers of the SliMP3 device, used to stream music over ethernet from a PC.
Stereo Link - - Offers USB audio products compatible with all formats: mp3, CD, Liquid Audio, Quicktime, and streaming. True Plug and play for Windows, Mac and Linux.
Vpedal - - Offers a foot pedal designed to connect to a computer to control the playback of MP3 and Wav sound files.