DIDASKALIA is a long-standing, high-quality, accessible collection of essays, reviews, and other information about Ancient theatre styles (primarily Greek and Roman) and their contemporary performances.
The online journal has been in existence since 1994, and all issues and articles are available online. It has not published constantly over that time, with a large gap between 1997 and 2001, and again between 2002 and 2004, 2007 and 2009, and 2009 and 2011. With the issue numbered "8" in 2011, a new, single issue, pdf format begins, and seems to have become annual (there are 2011 and 2012 issues in this format, and the 2012 issue is listed as "current.")
Many articles are potentially useful for the theatre history classroom or the individual theatre history student. Most useful is the search feature, which allows you to search the titles for any keyword (playwright, character, title, theme, etc.)
I was first introduced to this site / journal when I was in graduate school in the 90s, and it is good to see that it is still accessible and adapting to new technologies.