Hello Poetry (HP for short) is a place to post poems and get reviews. It has a large community and some interesting features. I've even gotten feedback from one of the staff members! It really is great. I get to read others' works and leave my thoughts as well as get new ideas for my own work. Check it out. Hello Poetry.
StudyBlue is in a completely different direction. It is a site that helps you make flashcards. You can share these flashcards with friends and classmates to help them out or you can keep them to yourself. Currently, it is helping me prepare for a Botany test that I may likely fail. They even have a mobile app for your smartphone! Here their link.
Don't fret about bookmarking these too much. I'll be adding them to my favorite links corner to the right.
Have fun enjoying these lovely sites :)