I've got the Astrid app on my phone (liked it so much I paid for the premium features), and it syncs with my Google Tasks, Calendar, etc. I mostly handle TODO i

I've got the Astrid app on my phone (liked it so much I paid for the premium features), and it syncs with my Google Tasks, Calendar, etc. I mostly handle TODO items on my phone, which sends me frequent (!) notifications when things are overdue.