M2s

M2S is an instant messaging application that lets you talk to your friends, share your location, write statements, create and / or join groups and share urls, videos youtube.

The application is compatible with any device with internet, so you can communicate with your contacts without having a smartphone or install any application. But you can also download the application for Firefox OS, Android, iPhone, Windows, Mac or Linux.

This is not an instant messaging application either, but an idea: To talk with everyone without having to enter your phone number, or having to buy a phone that supports this app. M2S is also a free app and is not dependent on mobile operators.