Goodreads is a website dedicated to helping keep track of your current reads and future reads. Upon becoming a member of this site, goodreads allows you to keep track of books you have read, are reading, and plan to read one day in the future. It also helps you find new books to read based on the rating you give books you've read.
Know-it-now is a website for young learners, and even older ones too. It keeps you in contact with a librarian where you can ask any sort of question, and there is even an academics section where you can get help with school 24/7.