Here you can find a categorized list of sites related to sound engineering and music in general.
Feel free to submit your site.

Link Exchange Directory On The Web

Reference books, papers and articles

Software, hardware, audio formats, tutorials and information, MIDI.

Personal Pages, Techno, Hip Hop, Turntablism

Music education, online courses for music producers, lessons.

Games, Internt games

Music magazines related to mixing techniques, hardware and software.

Personal sites of music producers and music production companies.

Sites of record labels accepting demos.

Personal pages, directories and E-Zines.