Agricultural Machinery - http://www.history.rochester.edu/appleton/a/agmac-m.html Contains descriptions and drawings of ground breaking, seed depositing, gathering, and miscellaneous farm implements.
Pioneer Engineers Club of Indiana - http://www.pioneerengineers.com A group of people who enjoy bringing their antique farm equipment to an annual show to foster appreciation for bygone days on the farm.
The Old Machinery Magazine - http://www.tomm.com.au/ An Australian bi-monthly magazine covering stationary engines, tractors and farm machinery, including rallies and auctions.
Chickentown Gas and Steam Association - http://www.chickentown.org Annual steam and gas engine show in Pennsylvania. Demonstrations and antique displays. See operating engines, sawmill, grist mill.
The Deere Farm - http://www.personal.psu.edu/users/b/r/brl115/pictures.htm Pictures of various restored antique tractors, engines, implements, and general items.
The J.I.Case Heritage Foundation - http://www.caseheritage.org/ Features photographs and show dates of steam traction engines, threshers and early gas tractors.