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.

Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.

Padlet - Visual boards for organizing anything.

Babble - A more personalized social network

Socrative - Socrative helps teachers engage the class with educational activities to measure and visualize...

LanguageBeast.com - Study English synonyms and antonyms to enrich your vocabulary