Gajim

Gajim, which uses the GTK toolkit, is an open source and free instant messaging client. You can do many things with Gajim, such as sending messages, transferring files, and joining chat groups. You can easily use the application, which supports Windows, Linux, macOS, and BSD formats, on different operating systems.

You can connect to your contacts using a server of your choice in the Gajim program, a full-featured XMPP client focused on the Jabber protocol. You can create multiple accounts in the application where chat applications are supported and easily follow your accounts.

With Gajim, which has an easy installation, you can make your text, voice, and video chats in a practical way. Thanks to the application, you can share pictures, videos, files, and sounds with your friends and groups. You can manage status updates, chat history, and contacts.

Gajim, which has many supports such as customizable themes, emoji support, and filters, has a more extensible structure thanks to Wikipedia and Wiktionary add-ons. The application, which has an offline messaging feature, offers support for more than 30 languages.

With end-to-end encryption support, you can conduct your conversations more securely with OMEMO, PGP or OpenPGP in Gajim. The security policies are quite high in the application where conversations can be kept safe by being encrypted. You can also receive notifications on mobile thanks to the program that can be used on mobile devices.