
Franz 2.0 is a desktop app that puts messaging services altogether in one place. It can combine apps like WhatsApp, Slack, Facebook Messenger, WeChat, HipChat, Skype and a lot more. You can even use multiple accounts for the Facebook Messenger - mix your business profiles and your private ones if you need to.
Never check all applications for whether inboxed or not. These apps like Station and Stack that curate applications and localize that desktop app increase recently. The app does not give notifications from the applications involved.
I like the idea of having one desktop app for all my messaging needs. This one is pretty good because it includes two big ones for me: FB Messanger and Whatsapp. It'd be perfect if it had IMessage too.