Zak McKracken-related links:

Zak McKracken Archiv

www.ElectricEggplant.com

Zak McKracken (Wikipedia Lexikon)

Zak McKracken Fakten, Lösung etc. (Tentakelvilla) (German)

Previews, reviews:

Spielezeitschriften (Scans)

Zak:btas Review bei netzwelt.de

Review bei adventuregamers.com (Englisch)

Adventures in general:

Adventure-Treff (German)

Adventurecorner (German)

Adventures Unlimited (German)

LucasArts Museum

Adventuregamers

International House of Mojo 

Other fan-adventure projects:

Taurus - The Potion of Time

Patrimonium

Baphomets Fluch 2.5 (Broken Sword 2.5)

Captain Delta

Sherman Toothrot

Indiana Jones and the Fountain of Youth

Zak McKracken and The Alien Rockstars