There are no commads in CraftBukkit. Only way to get commads is to install plugins like General Plugin that gives you command equivalietn to hMod ...
This isn't true, for example try /reload. *edit* or /#help I'll reiterate, is there a published document that contains known bukkit commands?
The only commands in CraftBukkit are the built in server commands. So in essence, help (from the server console) or /#help from the client *is* the documentation.
I use "/time set 0" to make day on the server or "/kick (playername)" to kick someone from the server and more...