Most of you already know Project Gutenberg where you can download tons of classics to your eReader of choice. But there are similar websites out there and one of them is Bibliomania.
The site offers free online literature with more than 2,000 classic texts along with literature book notes, author biographies, book sumeries and reference books. You can read the world's greatest fiction by authors such as Dickens and Joyce, Sherlock Holmes mysteries, all of Shakespeare's plays, or just dip into some short stories by writers such as Mark Twain, Anton Chekov and Edgar Allan Poe. This along with articles, interviews, and study guides to many of the books certainly separates what the formerly mentioned Project Gutenberg has to offer. Basically you can read, study and research on the site. Especially the latter is noteworthy with its sections on reference, biographies, non-fiction, and religious texts.
Before you get overly excited you should know that currently the site is not being actively maintained. Bibliomania.com Ltd no longer has any employees but the ex-employees keep the site running and have hopes of re-launching the site should funds become available. Still, there is plenty to read and learn here and maybe the site will be active again one day.