Skype for Slack - Move your slack discussions to a group skype call
Word Counter - A simple, beautiful word and character counter
Calls on Slack - Make voice calls in Slack
Count Wordsworth - Count Wordsworth makes it easy for you to monitor your literature-related metrics online.
Pingly - Your communication hub — Email, text & voice in one app
CharacterCounter.com - CharacterCounter.com is a free-to-use Online Character counter that displays the total number of characters in a text.