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
Instantbird is known for its lightweight and open-source nature, making it ideal for users who prioritize speed and customization. In contrast, IM+ offers a broader range of messaging service support and rich media capabilities, appealing to users who need a versatile communication tool.