Cross-platform messaging tool from Google
License: Free for personal use only
Hangouts is an app that's been created to bring iOS, Chrome and Android users together. Hangouts is available as an app for Android and iOS, as well as an extension for Chrome.
THis redesigned replacement fo Google Talk and Google+ Messenger enables you to easily keep in touch with people on different platforms. Hangout chat is fully synchronized between devices so you can move between Chrome, iOS and Android without any problems.
Hangouts does a good job of bringing together the better features of the services it's replaced. For the Google Talk users out there, the move to Hangouts will be incredibly easy. Though it cant really be compared to the likes of Skype or Whatsapp, the simplicity of Hangouts is sure to attract those looking for a more uniform user experience.