Kernelio

Dont want to pay for a private Git repo?  This is the way to go

Trello is great to manage tasks. There is no limitation on what you can do with it. The paid version support image upload and is very useful. I even use it as a shopping list for my new home  :>)  yes i am moving to my new home this month. So excited

coggle.it is a beautiful online tool to draw mind map. It is perfect to show complex ideas to your none-technical clients.

www.draw.io is a online drawing tool. It is very powerful and support google drive. Perfect for fast prototyping