SimpleCommandSigns was made to be as lightweight as possible.
This plugin runs in parallel to the other plugins.
Notes:
Because the player who triggers the sign is never identified, the %p identifier that was available in SimpleCommandSigns and HiddenCommandSigns will not work.
Commands are run as the console. Be conscious about what command you have them run.
Any permissions added to a HiddenCommandSign will be completely ignored by a RedstoneCommandSign.