From Compendium of Worldly Lore
Swashbucklers are one of the more straightforward DPS classes you will run across with limited features. Largely they focus on having a high dexterity bonus to AC. They also eventually get the ability to use their intelligence to help hit foes and reroll skill checks, a blend of luck and skill.
Role: DPS
Characteristics: A graceful battlefield warrior who can dodge in and out of combat
Source: Complete Warrior
Game Rule Information
The Swashbuckler has the following game statistics.
Abilities: Dexterity for combat prowess, Intelligence and Charisma help make successful swashbucklers
Alignment: Any
Hit Die: d10
Starting Gold: 4d4 x 10 gp
Class Skills
The Swashbuckler's class skills are Balance (Dex), Bluff (Cha), Climb (Str), Craft (Int), Diplomacy (Cha), Escape Artist (Dex), Jump (Str), Listen (Wis) Profession (Wis), Search (Int), Sense Motive (Wis), Spot (Wis), Swim (Str), Tumble (Dex), and Use Rope (Dex).
Skill Points at 1st Level: (4 + Int modifier) × 4
Skill Points at Each Additional Level: 4 + Int modifier
Class Features
All of the following are class features of the Swashbuckler.
Weapon and Armor Proficiency: A Swashbuckler is proficient with Swashbucklers are proficient with all simple and martial weapons, and with light armor.
Weapon Finesse Ex: A swashbuckler gains Weapon Finesse as a bonus feat at 1st level even if she does not qualify for the feat.
Grace Ex: A swashbuckler gains a +1 competence bonus on Reflex saves at 2nd level. This bonus increases to +2 at 11th level and to +3 at 20th level. A swashbuckler loses this bonus when wearing medium or heavy armor or when carrying a medium or heavy load.
Insightful Strike Ex: At 3rd level, a swashbuckler becomes able to place her finesse attacks where they deal greater damage. She applies her Intelligence bonus (if any) as a bonus on damage rolls (in addition to any Strength bonus she may have) with any light weapon, as well as any other weapon that can be used with Weapon Finesse, such as a rapier, whip, or spiked chain. Targets immune to sneak attacks or critical hits are immune to the swashbuckler's insightful strike. A swashbuckler cannot use this ability when wearing medium or heavy armor or when carrying a medium or heavy load.
Dodge Bonus Ex: A swashbuckler is trained at focusing her defenses on a single opponent in melee. During her action, she may designate an opponent and receive a +1 dodge bonus to Armor Class against melee attacks from that opponent. She can select a new opponent on any action. This bonus increases by +1 at every five levels after 5th (+2 at 10th level, +3 at 15th, and +4 at 20th). A swashbuckler loses this bonus when wearing medium or heavy armor or when carrying a medium or heavy load.
If the swashbuckler also has the Dodge feat, she need not designate the same target for this ability as for the Dodge feat. (If she designates the same target, the bonuses stack.)
Acrobatic Charge Ex: A swashbuckler of 7th level or higher can charge in situations where others cannot. She may charge over difficult terrain that normally slows movement or allies blocking her path. This ability enables her to run down steep stairs, leap down from a balcony, or to tumble over tables to get to her target. Depending on the circumstance, she may still need to make appropriate checks (Jump or Tumble checks, in particular) to successfully move over the terrain.
Improved Flanking Ex: A swashbuckler of 8th level or higher who is flanking an opponent gains a +4 bonus on attacks instead of a +2 bonus on attacks. (Other characters flanking with the swashbuckler don't gain this increased bonus.)
Lucky Ex: Many swashbucklers live by the credo "Better lucky than good." Once per day, a swashbuckler of 11th level or higher may reroll any failed attack roll, skill check, ability check, or saving throw. The character must take the result of the reroll, even if it's worse than the original roll.
Acrobatic Skill Mastery Ex: At 13th level, a swashbuckler becomes so certain in the use of her acrobatic skills that she can use them reliably even under adverse conditions. When making a Jump or Tumble check, a swashbuckler may take 10 even if stress and distractions would normally prevent her from doing so.
Weakening Critical Ex: A swashbuckler of 14th level or higher who scores a critical hit against a creature also deals 2 points of Strength damage to the creature. Creatures immune to critical hits are immune to this effect.
Slippery Mind Ex: When a swashbuckler reaches 17th level, her mind becomes more difficult to control. If the swashbuckler fails her save against an enchantment spell or effect, she can attempt the save again 1 round later at the same DC (assuming she is still alive). She gets only this one extra chance to succeed at a certain saving throw.
Wounding Critical Ex: A swashbuckler of 19th level or higher who scores a critical hit against a creature also deals 2 points of Constitution damage to the creature. (This damage is in addition to the Strength damage dealt by the swashbuckler's weakening critical class feature.) Creatures immune to critical hits are immune to this effect.