This skript needs no addons.
Commands :
/creategenerator <itemtypes> <timespan> [<boolean>] || generators.create
/generators || generators.list
/setgeneratoritems <number> <itemtypes> || generators.items
/setgeneratorlocation <number> || generators.location
/setgeneratorlimit <number> <number> || generators.limit
/setgeneratortime <number> <timespan> || generators.time
/togglegenerator <number> || generators.toggle
/deletegenerator [<number>] [<boolean>] || generators.delete
/cleargeneratordrops [<number>] || generators.clear
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more infos in skript file