What desktop apps do you use on your desktop, that also sync to your mobile phone?

Basically title, my wife and I swapped from the Apple world over to the Android side of things.

One thing I would love to do is use desktop apps for things like reminders, calendar, email, etc. Your basic stuff.

What apps/services would you recommend for us to use and get a more "complete ecosystem" experience? Which DE has the better apps for this line of thinking?

Thank you for your advice