Windows/Mac/Linux: If you use a lot of different messenger apps to keep in contact with people, say, Slack for work, Facebook Messenger for friends, WhatsApp for people overseas and Steam for your gaming buddies, you know how hard it is to keep track of all those. Franz stuffs them all into one app. Franz basically gives you tabs for each of your messaging apps and supports multiple accounts on each client. This can help clean up some serious tab clutter if you're used to keeping all of these open in your web browser. Franz doesn't see anything you send and works basically the same as any web browser would with login information. It currently supports 14 different services, including popular options like Facebook Messenger, WhatsApp, Hangouts, Skype and Slack.