Some tracker music artists:
Note: none of these people have asked to be linked here. Neither will you.
Alpha Conspiracy - Andrew "Necros" Sega's new music project.
Teque - demoscene industrial de luxe.
.cube - rusty, jagged, sharp brilliance.
Björn "Dr. Awesome" Lynne - the grand old master of the tracker scene. Now a game industry musician, and the master of capitalization. :)
Artists from the Age of Legends:
Tim Follin - A legendary composer from the C=64 era, still in the business.
Martin Galway - Stands behind some very memorable tunes from the Commodore era
Jeroen "WAVE" Tel and the Maniacs of Noise - Have done awesome C=64 game tracks, tracker music and the works, and Jeroen is now working in the game industry.
Rob Hubbard - The grande olde maestro of C=64 music
C=64 Music - a nice page dedicated to the artists of the era, with interviews, reviews et al.
... and for re-living the era:
SidAmp - A plugin that allows you to listen to the C=64 classics on WinAmp
High Voltage SID Collection - The ultimate C=64 music archive
Other interesting musicians / bands:
X-Nemesis - The coolest Finnish synthambient band.