Harken - Flashcard app using smart repetition to improve your memory
Lasso Content Curation - Become an information ninja. Stop losing the info you need.
Pocket - When you find something you want to view later, put it in Pocket.
Keep Everything - Light & Fast Web Archiver for iOS, OS X.
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
WebSatchel - Copy and save web pages to your own personal archive