A thin Javascript layer on top of Eclipse Paho's MQTT java client library.
This jar file is not a CraftBukkit Plugin. Instead it must be included in the classpath when launch CraftBukkit. CraftBukkit should be launched like this...
java -classpath sc-mqtt.jar:craftbukkit.jar org.bukkit.craftbukkit.Main
... This jar should be used in conjunction with the ScriptCraft plugin jar (which should be copied to the craftbukkit/plugins directory.