A great secondary source with a searchable timeline, articles on people and places, maps, and images.
The Internet History Sourcebooks Project is a collection of public domain and copy-permitted historical texts presented cleanly (without advertising or excessive layout) for educational use. Primary sources are available here primarily for use in high-school and university/college courses. From the outset the site took a very broad view of the sources that should be available to students and as well as documents long associated with a "western civilization" approach to history.
This collection, curated by Tufts University, covers the history, literature, and culture of the Greco-Roman World.