A quick tour of The Complete Warrior, looking for things worth looting for FC.
In Which The Complete Warrior is Plundered
Hexblade: This class probably justifies an Expert Class, as it is focused in concept. An approximation using existing options would be a Rune Knight with the Black Cat feat chain.
Samurai: Redundant, as the options are already well-supported in FC. Suggested Specialties: Adventurer, Aristocrat, Cavalier, Fighter. Classes: Soldier. Expert Classes: Gallant.
Swashbuckler: Redundant. Suggested Specialties: Acrobat, Adventurer, Aristocrat, Fencer, Fighter. Classes: Assassin, Burglar, Soldier. Expert Classes: Edgemaster, Gallant, (and of course) Swashbuckler.
Bear Warrior: Expert class material.
Bladesinger. Potential expert class material. Using current options, this could be a Fighter or Fencer who takes levels as a Mage. Rune Knight isn't a perfect fit but has the right capabilities.
Cavalier: Redundant. This is basically the Lancer.
Dark Hunter. Redundant. This is a Scout who specializes in Terrain feats such as Night Fighting and Pathfinder Basics (Caverns/Mountains). Suggested Specialties: Ranger, Vanguard, Warden.
Darkwood Stalker: This is essentially the Deadeye Expert Class. Suggested Specialties: Archer, Ranger. Suggested Classes: Explorer, Scout.
Dervish: Potential expert class material. Current options might include an Acrobat or Bard who levels in Burglar or Sage. Suggested Expert Class: Edgemaster.
Drunken Master: Potential expert class material, or alternatively, build drunken fighting and improvised weapon feat chains.
Exotic Weapon Master: This is just the Edgemaster.
Eye of Gruumsh: Paladin of Gruumsh. Alternatively, this could be an orc Captain who takes Rage feats.
Frenzied Berserker: Edgemaster, with Rage feats and anything that can be grabbed to boost toughness.
Gnome Giant-Slayer: Potentially, this is a Monster Slayer, but if you don't like the shield focus and don't figure the resistance to Trample is all that hot, this works as a straight up Burglar.
Halfling Outrider: Lancer.
Hulking Hurler: Hurled feat chain.
Hunter of the Dead: This can be built using existing options. Pick up the ability to turn undead via Specialty or the Priest ability, then go into Monster Slayer with a focus on one or more types of undead. Paladin can be substituted for Monster Slayer if preferred.
Invisible Blade: Knife feat chain.
Justiciar: Looks like some kind of nonlethal feat chain.
Kensai: This is an Edgemaster, Gallant, or Monk.
Knight of the Chalice: Monster Slayer specializing in demons, or a Paladin.
Knight Protector: Redundant. Suggested specialties: Aristocrat, Cavalier, Fighter, Lord, Vanguard. Suggested classes: Captain, Sage, Soldier. Suggested Expert Classes: Edgemaster, Gallant.
Master Thrower: Hurled feat chain.
Master of the Unseen Hand: Potential expert class material. I'm not quite sure how that would work.
The Mindspy: Probably redundant, once you have some psi classes to play with. This could be a feat chain granting the Combat Telepathy stance and some tricks.
Nature's Warrior: Potential expert class material.
Occult Slayer: Potential expert class material.
Order of the Bow Initiate: Deadeye Expert class.
Purple Dragon Knight: This is the Captain class.
Rage Mage: Spell Conversion: Casting Time pretty much covers the meat of this peculiar class. Just take Mage, and declare you are in a “spell range” whenever you use the Mage's core ability.
Ravager: Paladin of Erythnul.
Reaping Mauler: Wrestling feat chain. Acrobat would be a good specialty and Martial Artist a good class to build this around.
Ronin: This prestige class is just a grab bag of high BAB and sneak attack, meaning that it could be handled in a number of ways, probably just by taking more levels in Lancer or Soldier and taking a couple of Covert feats as bonus feats.
Spellsword: This is the Rune Knight.
Stonelord: This looks like a Priest with the Path of Earth. A more martial character could instead be a Paladin, focusing on the Path of Earth.
Tattooed Monk: Potential expert class material. Martial Artist/Monk is the closest fit with existing options.
Thayan Knight: Bodyguard Soldier with Iron Will.
War Chanter: Captain or Sage.
Warshaper: Possible expert class material.
Feats already covered by existing feats, tricks, and class abilities: Arcane Strike (Rune Knight abilities), Arterial Strike (I'll Cut You! or Jagged Slash), Axiomatic Strike, Dash, Defensive Strike, Defensive Throw, Earth's Embrace, Eagle Claw Attack, Faster Healing, Fleet of Foot, Flick of the Wrist, Flying Kick, Greater Kiai Shout, Greater Resiliency, Hamstring (Cheap Shot), Improved Rapid Shot, Improved Toughness, Intimidating Rage, Kiai Shout, Monkey Grip, Pain Touch, Phalanx Fighting, Power Critical, Sharp-Shooting, Shield Charge, Shield Slam, Swarmfighting, Weakening Touch.
Feats that are irrelevant because of the FC rules: Clever Wrestling, Close-Quarters Fighting, Extend Rage, Extra Rage, Extra Smiting, Extra Stunning, Favored Power Attack, Fists of Iron, Greater Two-Weapon Defense, Hold the Line, Improved Buckler Defense, Improved Combat Expertise, Improved Familiar, Improved Favored Enemy, Improved Mounted Archery, Improved Two-Weapon Defense, Improved Weapon Familiarity, Rapid Stunning, Roundabout Kick,
Feats potentially worth converting: Destructive Rage (as trick?), Eyes in the Back of Your Head (equivalent to never outnumbered), Freezing the Lifeblood, Instantaneous Rage (trick?), Karmic Strike, Pin Shield (trick?), Prone Attack, Ranged Disarm (trick?), Ranged Pin (trick), Ranged Sunder, Throw Anything, Zen Archery. Any of the Tactical or Weapon Style feats that isn't already covered by a feat chain or trick.