Nucleus - Curate the best of what you're reading for your network
Goodreads - See what your friends are reading.
Readapt - Designed for those with reading challenges like dyslexia and poor vision.
LibraryThing - A home for your books.
Jiffy Reader - Jiffy Reader is a browser extension that allows you to read any website faster.
Rocket Reads - A simpler alternative to Goodreads