You can two-way synchronize with Toodledo and RTM.

via Cyrket.

Runs on the T-Mobile G1

Full two-way synchronization with

“Remember The Milk” lists and tasks

“Toodledo” folders, tasks and contexts

Notifications based on geographical location

Notification based on the context

Textual, image, audio, video notes

Tasks can be submitted to others via SMS

via edouardmercier.fr.

You want your to-do's in the cloud, and you want them on your phone. There are quite a few list apps available for Android, but TooDo is my pick for the serious GTD crowd. TooDo is a very rich to-do manager that does all the things a featureful desktop task manager does—including reminders, categories, and dependencies—with some sweet location-aware goodness too, like geographical-based reminders (ie, if you're within range of the dry cleaner, pick up the pants). Since Android has had all kinds of trouble pinpointing my exact location, I can't tell you whether or not the geo-reminders actually work. To be honest, TooDo had so many options and controls, it was almost too overwhelming. The developer says attaching audio and video notes to tasks is even on the way. But the kicker feature? TooDo syncs with Remember the Milk and Toodledo, so you don't have to peck out your list on the phone keyboard.

via Best Android Apps To Boost Your Mobile Productivity (So Far) – Lifehacker Australia.