[steven_braham]

Franz: http://meetfranz.com/

It's a cross-platform messaging client that combines, Whatsapp, Facebook chat, Slack etc. into one application.

[anotheryou]

and a second ago I wondered why I as a wandows user even read this thread :) thanks

[anotheryou]

oh, it just wraps the web tab and captures the notifications. No better than pinned tabs for me I think.