Pidgin is a free, open-source, cross-platform chat client (formerly known as Gaim) that allows you to log-in and talk simultaneously on multiple chat networks....
Telegram is a free messaging app focused on simplicity, speed, and security. You can use Telegram on multiple devices at the same time; your messages will sync on smartphones, laptops, computers, or tables....
WhatsApp is a cross-platform messaging app that enables users to send messages, make voice and video calls, share media files, and conduct group chats....
