RollingStone.com - Extreme
- Biography, discography, photos, links, trivia, and message board.
- http://www.rollingstone.com/artists/extreme

BassMasta: Extreme
- Collection of bass tablatures.
- http://www.bassmasta.net/e/extreme/

VH1: Extreme
- News, links, music videos, audio samples, and a biography.
- http://www.vh1.com/artists/az/id_6922/artist.jhtml

Willie's Extreme Adventures
- Exclusive photos, personal stories, memorabilia and links.
- http://community-2.webtv.net/williextreme/WilliesExtreme

Celebrity Cafe: Extreme
- Interview with Mike Mangini, drummer, about superstardom and joining an established band.
- http://www.thecelebritycafe.com/interviews/extreme.html

DaveMcNally.com: Extreme
- Lyrics listed by album.
- http://www.davemcnally.com/Lyrics/Extreme/

Rise N Shine: Online Extreme Fanzine
- The fanzine for the band and its former members: Gary Cherone, Nuno Bettencourt, Pat Badger, Paul Geary and Mike Mangini. Features news, reviews, articles, interviews, photos, mailing list, fan stories and links.
- http://homepages.ihug.co.nz/~ali-may/

Extreme's Chords Archive
- Collection of tablatures and chords.
- http://music.kulichki.net/txt/extreme/