- Project Gutenberg -DRM-free ePub eBooks
- Library eBook Accessibility Program (LEAP) - provides print-disabled patrons with access to print materials in digital formats. Qualified patrons can download up to 20 accessible eBooks every month for a full year--at no cost to libraries and at no cost to patrons.
Boston Public Library has both Project Gutenberg and LEAP. Take a look at the BPL website, upper left hand corner (LEAP is labeled 'Accessible e-books for the print-impaired', and Project Gutenberg is labeled as 'Enjoy Additional eBooks today'.)