Padlet - Visual boards for organizing anything.
Storify - Create stories using social media. Turn what people post on social media into compelling stories. Collect the best photos, video, tweets and more to publish them as simple, beautiful stories that can be embedded anywhere.
Pinterest - Pinterest is a visual discovery tool that you can use to find ideas for all your projects and interests.
Listly - Listly is lists made made easy + social + fun! If you like lists, you will love Listly.
Pearltrees - Pearltrees is a place to organize all your interests. It lets you organize, explore and share everything you like.
uberflip - Organize and Centralize ALL of your Content in minutes