Guestboard - Lead powerfully-organized group events with Guestboard – a modular event platform that gives groups of 10-1000+ people a central space to coordinate, build excitement, and save money. No more crazy email threads. No more massive group texts.

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.

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Padlet - Visual boards for organizing anything.

Mobilizon - A free and federated tool to get our events off Facebook

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