Dashclock Chatter Extension is an extension for the Dashclock Widget that displays information about your unread messages from multiple messaging apps.
Please note that this requires root access on your device and you need to have Hangouts, Facebook or WhatsApp installed and configured on your device as this extension reads the messages straight out of your messaging installation. No configuration or credentials needed but you need to permanently give superuser permissions.
This application is entirely open-source. If you'd like to have new features or additional languages/locales please raise an issue ticket at https://github.com/mridang/dashclock-chatter or create a patch and send me a pull-request (if you're adventurous enough).
This extension requires the requires the Dashclock Widget by Roman Nurik: https://play.google.com/store/apps/details?id=net.nurik.roman.dashclock