Flow-e is a visualization layer on top of your Gmail or Outlook inbox. It provides an elegant Kanban-like workflow that's combined with the ideas behind Inbox Zero and GTD. Flow-e eliminates the need of external task management tools and transforms your inbox into a central To Do app.
Meetingbird - Powerful meeting scheduling and notes — right in your calendar
KanbanMail - A Kanban board for your emails.
Tooqan - Find out how effective your meetings are
Sortd - Rated the #1 App for Gmail
Worklife - WorkLife is a web and mobile app that helps you run highly productive, engaging meetings.
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)