Association for Theatre in Higher Education
The mission of the Association for Theater in Higher Education is to support and advance the study and practice of theatre and performance in higher education.
New York Public Library Digital Collections
You can search the NYPL digital collections for "American Drama" to find many full text plays in the public domain.
This is a central site for contacting and communicating with theatre professionals all over the world. The directory is searchable by keyword, location, and name.
The World Wide Web Virtual Library: Theater and Drama
This site points to resources in more than 50 countries around the world for professionals, academics, and amateurs of all ages.