This app was mentioned in 3 comments, with an average of 1.33 upvotes
I believe Chatous is the most popular one https://play.google.com/store/apps/details?id=com.chatous.chatous&hl=en
(https://play.google.com/store/apps/details?id=com.chatous.chatous) [can you make sure I'm getting the right one]