My Favorite tasks scheduling tool, Remember the milk has released a ‘full-featured’ mobile version specially optimized for iPhone/iPod Touch.
Features:
- View upcoming tasks (due today, tomorrow, and this week)
- View tasks by list (including Smart Lists), tag or location
- Add new tasks and notes
- Complete tasks with the touch of a button
- Edit existing tasks and notes
- Search tasks (supports advanced search operators)
- View handy settings (such as your Inbox email address)
Remember to use Remember the milk on your iPhone/iPod touch you need to have the Pro account ($25/year) of RTM. If you want to try you can try for 15 days and after you have to upgrade to pro. You can access the RTM from iPhone/iPod Touch from this URL http://i.rememberthemilk.com/
If you don’t know about the remember the milk i will strongly recommend you to try this, it is simple yet very useful service. You may also want to check out this Firefox extension so that you can access RTM from your Gmail right sidebar (bonus: you won’t see those boring Gmail ads). Source gHacks
Have you tried Task2Gather? It is very promising tool for managing tasks. The iPhone client is out already and Windows Mobile client will soon be released.