AirChat IM is a free and open source instant messaging application that is easy to use.
Not by a device to chat with friends? no problem, just go to https://airchat.urgero.org and login! You will be able to sign in and chat with your friends in a public chat room there.
Current features of AirChat IM include:
• End-to-end encryption with either OMEMO, OTR or OpenPGP
• Sending and receiving images, audio, or other misc files
• Pictures / Avatars for your Contacts
• Conferences Rooms (Works with our website so you can chat with ANY one in the world!)
• Address book integration
• Low battery impact compared to other XMPP/IM apps
• NO ADS!
This is a completely free app, no ads, no B.S.