Some students like being able to listen to a book as they're reading it; I know I do! These two sites both provide free audiobooks of texts in the public domain. If you're reading classic literature in class, see what's available to support students in their reading.
1. Shmoop: tons of literary guides, backgrounds, and analysis, including sections for Literature, Poetry, the Bible, Mythology, Bestsellers, and Shakespeare.
Shmoop
Google Lit Trips
Terra Clues