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.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Sortd - Rated the #1 App for Gmail
KanbanFlow - KanbanFlow is a Lean project management tool allowing real-time collaboration between team members. Supports the Pomodoro technique for time tracking.
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)
Meistertask - MeisterTask is an intuitive task management and collaboration tool.
Flow-e - Turn your Gmail or Office365 inbox to a Visual Task Board.