Wunderlist is a magnificent task manager which you should really try if you haven't already. It's available on all platforms that matter, synchronises across devices and you can send it emails to create tasks.
After upgrading to Windows 10 you may be a little disappointed to find niceties like the Live Tile no longer work. However the recently-acquired Microsoft company has been quick to get a Windows 10 ready version sorted and has released a beta for users willing to accept some bugs. Although thus far I have found that it has no obvious problems.
You can access the beta from the Microsoft Store here.