Chat.me is a free non-profit chat.
Chat.me is embedded in every site via iframe. It's super safe to use (the chat uses SSL certificates (HTTPS), and it's embedded in an iframe: CORS and XSS protection guaranteed). You will find a global tab to chat with everyone around the world, a site tab to chat with everyone who is visiting your same site, furthermore you can create custom rooms to chat with your friends, and pm message them too. Chat, send messages, audios and medias to everyone and have fun with Chat.me! :)