The two machines developed during the industrial revolution were the lathes and the boring machines. The lathes were used by craftsmen to shape other tools whereas the boring machines were used for boring the large-diameter cylinders on early steam engines. For more information, check out http://en.wikipedia.org/wiki/Industrial_Revolution#Machine_tools.
The tractor was not invented during the industrial revolution, and the plow was invented centuries before the industrial revolution, so all those people scolding you have no idea what they're talking about. The two agricultural implements that come to mind are the cotton gin and the reaper, both if which were invented in the 19th century during the industrial revolution.