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
Spark is designed primarily for email management with a focus on productivity, making it ideal for users who need a streamlined communication tool. In contrast, IM+ is a versatile messaging app that supports various chat protocols, catering to users who require a multi-platform messaging solution.