Proquest One Literature brings together one of the most comprehensive collection of primary texts, ebooks, reference sources, full-text journals, dissertations, video and more, for access to historical and contemporary content by and about celebrated and lesser-known authors from around the world. The international literature focus is especially useful!
After you search, the results are helpfully divided in to categories such as criticism, primary texts, reference works, dissertations, book reviews, etc. You can also limit results by aspects like peer reviewed, publication date, subject, and language.
Another nice search feature of this resource is that you can find both literary criticism and primary texts for poetry, drama, and prose. If you specifically search the primary texts, you can search by author nationality, author ethnicity, literary movement or period, or gender.
I also really enjoyed the Poets on Screen collection that is part of this database, where you can watch clips of poems being read aloud, sometimes by the poet.
If you need to do research about a literary text, author, literary movement, or genre, this is a great resource to begin your search!