Hey there! So, You're searching around Bukkit, looking for a plugin that disables fall damage, Thats it, No strings attached. Look no further! DisableFallDamage does exactly that! Simply fly the .jar file into your 'plugins' folder, and reload the server! By default the ops will have the fall damage disabled, But to disable it for others, such as donators, or for minigames, give the correct groups the permission 'nofall.enable'.
No config needed, as of now, 4/10/14!
Here are the set of permissions
More may come if needed.
If you have any ideas for my plugin, or need to report any bugs, Please send a ticket up there, You see up there? There! good.