These are some of the web sites that I have found interesting:
http://www.historytimeline.org/ provides a useful, interactive timeline of church history.
http://www.allaboutjesuschrist.org/ includes some information on Christian history, including the origins of Easter celebrations.
http://www.peshitta.org/ provides detailed information on the Aramaic New Testament used by the Church of the East, along with complete texts and interlinear English translations for the four gospels and Acts.
http://www.thenazareneway.com/lords_prayer.htm has some controversial content, but the audio of the Lord’s Prayer in Aramaic is a must-listen.
http://catalog.hathitrust.org/Record/008924253 includes the complete text of John S. C. Abbott’s History of Christianity.
http://www.reformedreader.org/btimline.htm provides a detailed timeline of the history of the Baptist denomination.
http://www.christianitypath.com/ is geared to the broad, global Christian community.
http://www.ctlibrary.com/ch/1994/issue43/4322.html give a brief timeline of the development of Christian scripture
http://www.bible-researcher.com/canon.html provides links to many resources regarding the Biblical canon
http://www.earlychristianwritings.com/index.html is another site with chronologically organized links to many early Christian writings