KanbanMail takes your inbox from a confusing mess and turns it into a clear action plan!
KanbanMail has gone through lots of improvements and optimizations throughout the last year. If you are looking for a way to optimize your email workflow, you should give it go.
Sortd - Rated the #1 App for Gmail
Shift - Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)
Mia for Gmail - A desktop email client for your Mac, without a browser !
Flow-e - Turn your Gmail or Office365 inbox to a Visual Task Board.
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.