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+ is a versatile messaging app that supports multiple protocols and platforms, making it suitable for users who need cross-platform communication. In contrast, Windows Live Messenger was primarily designed for Windows users but is now discontinued, limiting its usability and features.