Tacitus - The Histories [MIT]  
   A history of the Roman Empire by Tacitus, written 109 AD and translated into English by Alfred John Church and William Jackson Brodribb. Part of the Internet Classics Archive at MIT
   http://classics.mit.edu/Tacitus/histories.html

Tacitus - The Annals [MIT]  
   English translation by Alfred John Church and William Jackson Brodribb of The Annals of Ancient Rome, part of the Internet Classics Archive
   http://classics.mit.edu/Tacitus/annals.html

Tacitus - Germany [Medieval Sourcebook]  
   English translation by Thomas Gordon of Germania by Tacitus
   http://www.fordham.edu/halsall/basis/tacitus-germanygord.html

The Annals  
   An unattributed English translation.
   http://www.ourcivilisation.com/smartboard/shop/tacitusc/annals/

The Histories  
   Translation by Kenneth Wellesley, annotated with maps, modern place names, and a glossary explaining the meaning of some of the ancient Roman titles.
   http://www.ourcivilisation.com/smartboard/shop/tacitusc/histries/index.htm

The Life of Gnaeus Julius Agricola [Iowa State University]  
   An English translation of the Life of G. Julius Agricola, the Roman general who campaigned in Britain on behalf of emperor Vespasian.
   http://www.chieftainsys.freeserve.co.uk/tacitus_agricola.htm

The Tacitus Home Page  
   A vita, summary of works, and basic bibliography of Cornelius Tacitus, from Steven H. Rutledge, a classics professor at the University of Maryland.
   http://www.classics.umd.edu/Faculty/SRutledge/tacitus.html