The Jimi Hendrix Record Guide
Purple Jim's comprehensive discography, lots of information and an alphabetical song index.

Jimpress Towers
The home of JimPress magazine and the invaluable reference From the Benjamin Franklin Studios.

Early Hendrix
Niko Bauer & Doug Bells's site with information about the pre-fame career of Jimi Hendrix.

Mitch Mitchell
Site by Olve Strelow.

All things vinyl.

Just Ask The Axis
A searchable database of Jimi Hendrix gigs, interviews and jams that are known to have taken place, along with details of known set lists and audio recordings.