nohistory.chat - nohistory.chat - free, anonymous and disposable web chat.
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.
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.
GroupMe - GroupMe is a mobile group messaging app owned by Microsoft.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Adium - Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.