* Summarized from the RoT Wiki:
Dodge Bonuses: Some other AC bonuses represent actively avoiding blows. These bonuses are called dodge bonuses. Any situation that denies a Dexterity bonus also denies Dodge bonuses. (Wearing armor, however, does not limit these bonuses the way it limits a Dexterity bonus to AC.) Unlike most sorts of bonuses, dodge bonuses stack with each other.
Loss of Dexterity and Dodge Bonuses: Whenever a character is flat-footed, she loses any applicable dexterity and dodge bonuses. Characters which are stunned, asleep or paralyzed, or else not actively engaged in combat are considered flat-footed. Some feats, such as Uncanny Dodge, will allow a character to retain Dexterity bonuses to armor class if the character is caught flat-footed.
Note: resistance and immunity to Stun, Sleep and Paralysis spells and effects are very desirable too, but these are relatively easy to acquire through spells and magic items as you progress through the campaigns, and can be gained through race and class attributes, as well.
Type of Feat: Class
Prerequisite: Barbarian level 2, Cleric with the Air Domain, Rogue level 4, Scout level 2, Assassin level 2, Avenger level 2, Dwarven Defender level 2, Fist of the Forest level 2, Sacred Fist level 6, Shadowdancer level 2,
Specifics: The character retains his Dexterity bonus to AC, even if caught flat-footed or attacked by a hidden or invisible creature.
Class Analysis and Comparison: What follows is a brief list detailing the requirements a build must meet to take the Uncanny Dodge feat-granting class, and the class-level at which the feat is acquired.
Barbarian 2 – Alignment Restrictions: must be non-lawful alignment
Cleric 1 – Requirements: must choose Air Domain
Druid 3 – Alignment Restrictions: any neutral; Wisdom 14 (including item ability bonus); must memorize 2nd level spell Wild Instincts (see spell information below).
Ranger 12 (technically 11 with WIS 16) – Requirements: Wisdom 16 (including item ability bonus); must memorize 3rd level spell Wild Instincts (see spell information below).
Rogue 4 – Requirements: None
Scout 2 - Requirements: None
Spirit Shaman 4 – Requirements: Wisdom 14 (including item ability bonus); must select 2nd level spell Wild Instincts (see spell information below).
Swashbuckler 15 - Requirements: None (RoT Custom Class Mod)
Assassin 2 – Requirements: Skills: Hide 8 ranks, Move Silently 8 ranks.
Avenger 2 – Requirements: Alignment: any non-chaotic; Skills: Hide 8 ranks, Move Silently 8 ranks.
Dwarven Defender 2 – Requirements: Race: Dwarf; Alignment: Any lawful; Base Attack Bonus: +7; Feats: Dodge, Toughness.
Fist of the Forest 2 - Requirements: Base Attack Bonus +4; Feats: Great Fortitude, Improved Unarmed Strike, Power Attack; Skills: Survival 4.
Guild Thief 2 – Requirements: Feats: Stealthy; Skills: Bluff 3 ranks, Hide 8 ranks, Intimidate 3 ranks, Move Silently 3 ranks.
Sacred Fist 6 – Requirements: Base Attack Bonus: +4; Feats: Improved Unarmed Strike, Stunning Fist, Combat Casting; Skills: Lore 8 ranks; Spellcasting: Ability to cast 1st level divine spells.
Shadowdancer 2 – Requirements: Class: may not have any Child of Night levels; Feats: Dodge, Mobility; Skills: Move Silently 8 ranks, Hide 10 ranks, Tumble 5 ranks.
Swiftblade 7 - Requirements: Feats: Dodge, Mobility; Weapon Proficiency: Bard, Elf, Grey Orc, or Martial;
Base Attack Bonus: +3; Skills: Concentration 6, Spellcraft 6; Spellcasting: Able to cast 3rd level Arcane spells; Spell Known: Haste
Wild Instincts (Spell):
KPRC / ROT Customized
Caster Level(s): Druid 2, Ranger 3
Innate Level: 2
Component(s): Verbal, Somatic
Area of Effect / Target: You
Duration: 1 minute/level
Spell Resistance: No
You gain a +10 Insight bonus on Listen and Spot checks. In addition, you retain your Dexterity bonus to AC even if Flat-Footed and/or attacked by an unseen opponent (granted Uncanny Dodge feat).
Esoteric Colure (Daggerspell Mage Set ring): Use Limitation: Class Daggerspell Mage; Level Limitation: Requires 10 class levels of Daggerspell Mage to equip; Bonus Feat: Uncanny Dodge.
(I vaguely recall a special guild item that may have granted the Uncanny Dodge feat… I will edit this if I find more information.)