InboxZero - The best and most innovative mail app to master your overloaded mailbox.
Acapela - All your work notifications in one inbox
Google Workspace - Google's encompassing suite of cloud-based business apps.
SubscriptionZero - Declutter your Inbox by combining your newsletters emails
Countdown to Inbox Zero - Always respond on time
Flow-e - Turn your Gmail or Office365 inbox to a Visual Task Board.