WorkspacePro - Launch a bunch of macOS apps from menu bar just in 1 click!
Shift - Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps
Firework - Firework turns web apps into separated and customizable desktop apps which ready to use immediately.
Mia for Gmail - A desktop email client for your Mac, without a browser !
Basaas - Connect all apps into one solution and boost team productivity
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.