The Hangouts app for chat or voice/video calls is available on Android, iOS, and on the Internet.

In a blogpost, Skype writes, “In light of the devastating events that have taken place in Paris, we want to help people stay in touch with friends, family and colleagues. So, with immediate effect we are making all domestic and international calls to landlines and mobiles in France free of charge* for the next few days.”

Similarly, in a Google+ post, the search giant has also announced calls made to France via Hangouts app will be free of the international charges. The post reads, “We’re thinking of you, Paris. No fees on calls to France, via Hangouts. #ParisAttacks” So, we can assume, Google hasn’t added any geographical restrictions and the calls can be made from anywhere in the world.

In a similar move, Facebook also got into the action with a "Safety Check" letting others know if they are unharmed. Twitter users came up with the hashtag, #PorteOuverte, i.e. "open door."

In France, the hashtag @PorteOuverteFRA was established by Twitter to check if the anyone needs a place to spend the night at the homes of volunteers who opened the doors to the victims and releatives.