Here are some links, some useful in the field I am working in, some others for fun.

Jeff Mallett's Songwriter Site - a large collection of links for songwriters
Muzer - Dutch site for musicians

Some of my favourite bands' websites that I am and have been working on:
Twelfth Night
Netherworld
Nektar - Chronology
Pallas - Official Website
Pallas - Database
And the progressive rock website I helped set up and work for:
Dutch Progressive Rock Page

World Of Images - Sandra's photos

Some friends!
Studio Lans Produkties: Joep Lans
Graphics4You: Véda Lans

And some stuff I just love...
Creamundo - 9800 free fonts