Weapons of Arkadia
Armor of Arkadia
Equipment of Arkadia
Massive Damage Threshold
Armor as Damage Reduction
Note that damage taken is cumulative within one round for the purposes of calculating massive damage. If your threshold is 14 and you've been hit for 5 points of damage three times in one round, you need to make a DC 15 Fort save....and you're hit in the same round again for 1 hp, you need to take another save.
Failing a massive damage check immediately places you at -8 hp.
Alternate ranger class
Wizards select their spells from the druid spell list as opposed to the wizard/sorcerer list. Spells from that list are still arcane in nature; it's just the spells that are different. Remove any divine focus requirements for any spell. Along the same lines, any other arcane class must pick from this list (which means that arcane classes such as the duskblade and beguiler will not be permitted). Arcane magic is referred to as "geomancy" in this setting.
Druids and monks will not be permitted.
Wolves, swans and black bears are extremely popular choices for shapeshift forms in Arkadia, and such shape changers have their own "lodges" (and resources to share with their fellows). You may well get an opportunity to voluntarily limit your forms and gain other bonuses in play. The ranger spell list is unchanged, but it is considered arcane rather than divine (and uses Intelligence rather than Wisdom as the key stat).
Clerics have two deity choices: Mother Firebird, a good deity with Sun, Good, Fire, and Protection as potential domains; and the Grey Wolf, a stern goddess who grants the War, Winter, Animal, and Law domains. Generally, both deities are worshiped in conjunction. Exact details of worship haven't been fully spelled out, but are inspired by the Russian Orthodox Church.
Any class that has Craft or Profession as a class skill also has Perform as a class skill.
If a character has 5 or more ranks in Craft(poison), he never risks accidentally poisoning themselves when applying poison to a blade. The character is also treated as having the Poison Use class feature for the purposes of qualifying for feats.