Alright, here are some basic, non-GM commands that are for everyone.
/go [insert number 1-10]
This command allows you to warp to the location designated by the number. Type "/go" by itself to see a list of available locations.
/hair [insert number]
This command allows you to change your hair ingame. Remember that hair choice is available when creating a character as well, but this command is for later decision changes.
/class [insert class name]
This command allows you to change your class, however, only one level up. For example, a visitor would NOT be able to change directly into a Raider. The visitor must first change into a hawker, then raider.
/allskill [insert character name]
Gain access to every skill of your job. Must be in second job (Raider, Scout, Bourgeois, Artisan, Cleric, Mage, Knight, Champion) to use this.
You must relog after using the command for the command to take effect
/job [insert class name]
Same as /class.
/who
Pretty useless command, but for those curious georges - shows who's on.
/reborn
Resets your level to 1. Only usable at level 250. Also disconnects you and has no effect.
I'll add in more later, once I figure out what commands are GM and what aren't. xP.