Discord History Tracker - Discord History Tracker is a great tool that enables you to select chat history and save it in your private conversations, servers, groups, and then view it anytime without needing an internet connection.
JabbR - A chat application built with ASP.NET and SignalR.
Pyno - Pyno is a mobile application that shows your Facebook chat history.
MyENIGMA - MyENIGMA is an app that allows you to send text messages, videos, audio clips, photos, and files to your friends and family securely.
iMessage - iMessage is an unlimited text messaging system for the Mac OS X operating systems that provide the iOS users to send unlimited messages to other iMessage users on Mac or other iDevices for free.
Worlize - Worlize is the platform that allows users to communicate with each other in a fun way and play games that are created by the users on this platform.