Tenth Pass

Bitkim Weyr
A relaxed canon (female blueriders allowed) round-robin PBEM set on the Southern Continent in an alternate Tenth Pass where AIVAS was discovered, but its plan to destroy Thread failed.
http://www.geocities.com/bluedrgnpern6/main.html

Blooded
A play-by-email club for Candidate and Weyrling personas only, set at Southern Weyr during the final Turn before the Tenth Pass.
http://www.geocities.com/bloodedbod/

Fallen Stars of Pern
A strict canon, full post play-by-email club set during a Tenth Pass where AIVAS plan failed and the grubs were destroyed by parasites.
http://fsop.pbemrealm.com/

Triad Weyrs
A strict canon, full-post club set on the Southern Continent during an alternate Tenth Pass where AIVAS' plan failed and Thread returned after a 1200 turn Interval; featuring a post-plague female oppression scenario.
http://www.triadweyrs.org/

VentureWeyr
A relaxed canon (Modern, Gypsy Weyrless, Hidebound, and Ghost Weyrs) round-robin PBeM set in an alternate Tenth Pass where AIVAS was discovered, but its plan to destroy Thread failed.
http://www.freewebs.com/ventureweyr/