Padlet - Visual boards for organizing anything.
Pinterest - Pinterest is a visual discovery tool that you can use to find ideas for all your projects and interests.
BookWidgets - BookWidgets is an excellent application that let you create engaging exercises in minutes and easily share a varied variety of beautiful and fun activities with your classroom and others.
Pearltrees - Pearltrees is a place to organize all your interests. It lets you organize, explore and share everything you like.
Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
Stample - Share bookmarks, articles, files and notes.