IM+
Freemium
IM+ supports simultaneously major IM services, including Google Talk, Twitter DMs, Yahoo!, AIM/iChat, ICQ, Jabber (and Slack through Jabber), etc.
Disa
Open Source
Disa is your new messaging hub. Conversations from different services can seamlessly be joined together, or disbanded within seconds.
GroupMe
Free Personal
GroupMe is a mobile group messaging app.
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
Compare Franz with alternatives
Compare Dialog Messenger and Franz and decide which is most suitable for you.