Shift - Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps

Choosy - Choosy opens links in different browsers as specified, according to rules, set by the user.

Mia for Gmail - A desktop email client for your Mac, without a browser !

Finicky - A MacOS app for creating rules that decide which browser is opened for every link that would open...

Mailplane - Mailplane is the best way to use Gmail on your Mac. Use an unlimited number of accounts, get new mail notifications, use plug-ins and much much more.

Browser Select - Browser Select is a utility to dynamically select the browser you want instead of just having one...