Links are arranged alphabetically. If you'd like me to link to you, send me an email at kezune_twitch (at) hotmail (dot) com or PM me at one of the forums.
Petz Communities
Duke's Group is a small forum where the focus is on raising your petz naturally. Despite the small size of the group, it's actually pretty active.
Petz Community Gathering (PCG, inactive)
Though I have a membership here, this forum is now inactive.
Petz Kennel Club (PKC)
Petz Kennel Club is a very structured website centered entirely around showing. It has a forum attached that is pretty active but focuses largely on showing and hexing realistic looking breed files.
The RKC Petz Forum is a general-purpose Petz forum. In general, it's pretty busy but it's also catered towards being very kid-friendly.
Seeing Stars is a forum focused on buying, selling and showing horses, particularly the Manda hexes.
Whiskerwick is a buying/selling petz site with a relaxed atmosphere and a rich economy.
Player Websites
This site is focused primarily on hexing tutorials. It also has a large collection of breedz.
This site is focused on understanding Petz genetics and how genes are passed from generation to generation.
Petz Genetics is a site dedicated to understanding how petz inherit various traits from generation to generation.
Supernova has a ton of breedz! The site also features tutorials and some toys and clothes.
VPZ Research Center is focused on hexing education and also has so many, many breedz.
Related links are Vickie's Show Breedz and Vickie's Fun Breedz.