This is a very thorough one. It lists many events by a single year or within a period. Word of warning--it's a little slow.
http://www.historymole.com/

This timeline is great  for biographies:
http://www.sbrowning.com/whowhatwhen/index.php3

More timelines:
http://www.hyperhistory.com/online_n2/History_n2/a.html
http://inquiryunlimited.org/timelines/index_timelines.html