IM+ supports simultaneously major IM services, including Google Talk, Twitter DMs, Yahoo!, AIM/iChat, ICQ, Jabber (and Slack through Jabber), etc. Developed by SHAPE Services
License: Freemium
IM+ offers a more user-friendly experience with support for various messaging protocols, making it suitable for casual users. In contrast, Gajim provides strong security features and customization options, making it a better fit for professional and technical users.