Using the simple concept of four skills to a class, it's easy to make custom classes. Here are a few to use as examples.

Alchemist
Class skills: alchemydeceptionintelligencewisdom

Bard
Class skills: deception, perform, persuasion, streetwise

Cavalier
Class skills: animalsfortitudepersuasionweaponry

Courtier
Class skills: deception, empathy, persuasion, weaponry

Druid
Class skills: animalsreligionsurvivalwisdom

Gunslinger
Class skills: awarenessfirearmsintimidationreflexes

Monk
Class skills: awarenessstrengthreflexeswillpower

Necromancer
Class skills: intelligence, intimidationreligion, spellcraft

Paladin
Class skills: fortitude, persuasion, religion, willpower

Ranger
Class skills: animalsweaponrystealthsurvival

Spellsword
Class skills: awarenessdexterityspellcraft, weaponry

Tinker
Class skills: craft, engineering, firearms, intelligence