Remember the Milk (rememberthemilk.com) is a very powerful task management service that allows users to create multiple task lists.  It allows users to manage tasks from their website as well as offline or through their mobile phone apps. It has app's for iOS,Android,Blackberry and Windows Mobile, and is well integrated with other services like Microsoft Outlook, Gmail, Google Calendar and Twitter.

Platforms : Android, iOS, Blackberry, Windows Mobile, Desktops

Price : App's are free. Service requires an account on rememberthemilk.com that costs 25$/year (free for a trial period).

App review by team GeoTask (Anush Mohan and Lei Shi).

RememberTheMilk-appReview.pptx