These are the skills as far as I know them. There could be more than these, but I've taken them from strong players in every guild.

=======SKILLS=====================================
combat.............. | | | offensive.....
| offensive......... | | | defensive.....
| | blunt........... | | | special.......
| | | clubs......... | | control.........
| | | flails........ | | | living........
| | | staves........ | | | objects.......
| | pierce.......... | | | immaterial....
| | | daggers....... | | special.........
| | | spears........ | | | protection....
| | | swords........ | | | knowledge.....
| | range........... | | | natural.......
| | | thrown........ | | black...........
| | | shot.......... | | | curses........
| | slash........... | | | alchemy.......
| | | axes.......... | | | demons........
| | | knives........ | items.............
| | | polearms...... | | staves..........
| | | swords........ | | wands...........
| | unarmed......... | | scrolls.........
| | | martial-arts.. | | miscellaneous...
| | | | strikes..... | mana..............
| | | | throws...... covert..............
| | | brawling...... | stealth...........
| | | | strikes..... | | stalking........
| | | | throws...... | | sneaking........
| defensive......... | | hiding..........
| | dodging......... | | spying..........
| | | melee......... | | disguise........
| | | range......... | sleight-of-hand...
| | parrying........ | | passing.........
| | | armed......... | | palming.........
| | | unarmed....... | | stealing........
| special........... | mechanics.........
| | charisma........ | | lockpick........
| | multi-weapons... | | traps...........
| | protection...... | | sabotage........
| | savagery........ | items.............
| | shields......... | | weapons.........
| stamina........... | | poisons.........
| tactics........... | | miscellaneous...
worship............. | slyness...........
| spells............ general.............
| | elemental....... | movement..........
| | | fire.......... | | riding..........
| | | water......... | | swimming........
| | | earth......... | | climbing........
| | | air........... | | boating.........
| | health.......... | instinct..........
| | | wounds........ | | awareness.......
| | | diseases...... | | survival........
| | | poisons....... | | searching.......
| | | curses........ | knowledge.........
| | control......... | | weapons.........
| | | summoning..... | | religion........
| | | servitude..... | | street..........
| | | dismissal..... | | business........
| | special......... | communication.....
| | | protection.... | | reading.........
| | | knowledge..... | | writing.........
| | | natural....... | | talking.........
| rituals........... | smithing..........
| | sacrifice....... | valueing..........
| | prayer.......... | | jewelery........
| | blessing........ | | weapons.........
| | curses.......... | | armours.........
| items............. | sense.............
| | artifacts.......
| | weapons&armors..
| | miscellaneous...
| faith.............
magic...............
| spells............
| | psychic.........