Tells your party members when you interrupt stuff, or fail to do so. There's no config except you can manually set a variable in the Lua file to tell the addon where to output the interrupt message. By default it will output to party chat. Foo: Bar (Zee) Foo is the ability you used to interrupt with, Bar is the spell you interrupted, and Zee is the target you interrupted.
Gnomishatter is a simple addon to automate Shattering Throw during raids. Whenever a warrior starts the chain, the next warrior will automatically be notified that he needs to apply Shattering Throw next. Much like GnomishInterrupter there's not much to go on, just drop it in and go. Note that only one warrior in the raid should be running this addon, if more than one does then it will ruin the rotation.