I've been working on this side project(http://www.axonotes.com) for some time. It is a read it later library with spaced repetition for enhancing learning and recall. Most of the flash card applications out there force you to turn information in "back/front" form. With Axonotes, my plan is to to make it easier to integrate spaced repetition while you are reading something with minimal overhead. You can also use it as a read-it-later library.

Currently, you can save full web pages using the Chrome Extension, organise them in books, annotate important stuff to make cards out of it, and be reminded to review your saved content using spaced repetition algorithm. In future, I plan to support more file formats like pdf, doc etc.

Any constructive criticism is deeply appreciated. Thanks for taking a look.

Heads up: Currently you need to sign up (Google) and download the chrome extension to start saving full web pages. I realise it is a pain, will work on something that allows easier trials.