Alchemy

+2 circumstance bonus if Alchemists's lab

Appraise

+2 on items made with a specific Craft skill, if 5 ranks in that skill

Balance

+2 bonus if Agile feat
+2 bonus if Heritage of Goblin feat
+2 bonus if Leopard's Grace feat
May take 10 on all checks if Fight Across the Rooftops Feat
+2 bonus if 5 ranks in Tumble

Bluff

+3 morale bonus vs. Favored Enemy
+2 bonus if Persuasive feat
+4 racial bonus on disguise if half-breed

Climb

+3 bonus if lizard familiar
+2 bonus if Athletic feat
+8 racial bonus if creature with Climb speed

Concentration

+4 bonus to checks made while casting on the defensive if Combat Casting feat.

Craft

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Decipher Script

+2 bonus if Diligent feat

Diplomacy

+2 bonus if Negotiator feat
+3 bonus with members of your order if Membership feat
+2 bonus if 5 ranks in Bluff
+2 bonus if 5 ranks in Knowledge (Nobility and Royalty)
+2 bonus if 5 ranks in Sense Motive
+2 bonus for checks involving bureauocracy if 5 ranks in Gather Information

Disable Device

+2 bonus if Nimble Fingers feat
+4 bonus if Improved Trap and Lock Master feat
+2 bonus if Trap and Lock Master feat

Disguise

+2 bonus if Deceitful feat
+4 racial bonus on disguise if half-breed
+2 bonus if 5 ranks in Bluff (when being observed and acting in character) .

Escape Artist

+2 bonus if Agile feat
+2 bonus escaping from rope bonds if 5 ranks in Use Rope

Forgery

+2 bonus if Deceitful feat

Gather Information

+2 bonus if Investigator feat
+(character level) competance bonus in homeland if Exile feat
+2 bonus if 5 ranks in Knowledge (Local)

Handle Animal

+4 circumstance bonus to Druids for animal companions
+2 bonus if Animal Affinity feat

Heal

+2 bonus if Self-Sufficient feat
+2 circumstance bonus if Healer's Kit
+2 bonus when treating a poison if 5 ranks in Poison

Hide

+40 bonus if immobile and invisible
+20 bonus if mobile and invisible
+2 bonus if Stealthy feat
+4 racial bonus if Small (as Nimbic)

Intimidate

+4 bonus for every size category you are larger than your target
-4 penalty for every size category you are smaller than your target
+3 morale bonus vs. Favored Enemy
+2 bonus if Persuasive feat
+2 bonus if Stern feat
+2 bonus if 5 ranks in Bluff

Jump

+4 bonus on running start if Run feat
+2 bonus if Acrobatic feat
+2 bonus if 5 ranks in Tumble

Knowledge

+3 morale bonus on checks about Favored Enemy
+2 bonus to Knowledge (Research) if 5 ranks in Gather Information
+2 bonus to Knowledge (Nature) if 5 ranks in Survival

Listen

-4 penalty if Fascinated
+2 bonus if Alertness feat
+10 competence bonus to avoid being surprised if Intuition feat
+2 bonus if Watchful Guard feat
+2 racial bonus if elf or halfbreed elf
-10 penalty if sleeping

Move Silently

+3 bonus if Cat familiar
+2 bonus if Leopard's Grace feat
+2 bonus if Stealthy feat

Open Lock

+2 bonus if Nimble Fingers feat
+4 bonus if Improved Trap and Lock Master feat
+2 bonus if Trap and Lock Master feat

Perform

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Poison

+2 bonus when crafting a natural poison from an animal if 5 ranks in Handle Animal
+2 bonus when crafting poisons from plants if 5 ranks in Profession (Herbalist)
+2 bonus when crafting poisons from plants if 5 ranks in Survival

Profession

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Ride

-5 penalty if riding bareback
+2 circumstance bonus to staying in the saddle if Military saddle
+2 bonus if Animal Affinity feat
+2 bonus if 5 ranks in Handle Animal

Scry

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Search

+2 racial bonus if elf or halfbreed elf
+2 bonus if Investigator feat
+2 bonus to find secret doors or hidden compartments if 5 ranks Knowledge (Arch & Engr)

Sense Motive

+3 morale bonus on Favored Enemy
+2 bonus if Negotiator feat

Sleight of Hand

+2 bonus if Deft Hands feat
+2 bonus if 5 ranks in Bluff

Speak Language

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Spellcraft

+2 bonus on spells from specialty school if specialist wizard
-5 penalty on spells from prohibited schools if specialist wizard
+3 morale bonus on Favored Enemy
+2 if 5 ranks in Knowledge (Arcana)
+2 bonus to decipher spells on scrolls if 5 ranks in Use Magic Device

Spot

-4 penalty if Fascinated
+2 bonus if Alertness feat
+4 bonus if Hawk Sight feat
+10 competence bonus to avoid being surprised if Intuition feat
+2 bonus if Watchful Guard feat
+2 racial bonus if elf or halfbreed elf
+3 bonus in daylight or lighted areas if hawk familiar
+3 bonus in shadowy or darkened areas if owl familiar

Survival

+5 bonus to find food or water if La Hashan Descending feat
+2 bonus if Self Sufficient feat
+2 bonus to keep from getting lost or to avoid natural hazards if 5 ranks Knowledge (Geography)
+2 bonus in aboveground natural environments if 5 ranks in Knowledge (Nature)
+2 bonus on other planes if 5 ranks in Knowledge (The Planes)
+2 bonus underground if 5 ranks in Knowledge (Dungeoneering)
+2 bonus to find or follow tracks if 5 ranks in Search

Swim

+2 bonus if Athletic feat
+4 bonus to avoid fatigue if Endurance feat
+8 racial bonus if swim speed

Tumble

+2 bonus if Acrobatic feat
+2 bonus if 5 ranks in Jump

Use Magic Device

+2 bonus if Magical Aptitude feat
+2 bonus to checks involving scrolls if 5 ranks in Decipher Script
+2 bonus to checks involving scrolls if 5 ranks in Spellcraft

Use Rope

+2 circumstance bonus if silk rope (stacks with animate rope)
+2 circumstance bonus if cast animate rope on that rope (stacks with silk rope)
+2 bonus if Deft Hands feat
+2 bonus to bind someone if 5 ranks in Escape Artist