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.
Quip - Quip is the modern productivity suite that simplifies your life and helps your team get work done faster.
Sortd - Rated the #1 App for Gmail
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)
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.
Flow-e - Turn your Gmail or Office365 inbox to a Visual Task Board.