I have been looking for software to use the Getting Things Done time management techniques with my O2 Xda mini S (I think it’s O2’s equivalent to the QTek 9100) and finally found a rather good one: MyLife Organized. There’s a MyLife Pocket PC and Windows Desktop application to manage tasks, projects and deadlines and both applications can be easily synchronized.
Although I don’t use all of the features (deadlines, time tracking etc), it’s a decent program to use GTD on the road and never forget an important task again.
The only problem I had with MyLife was with the registration process: If you plan to buy MyLife, make sure to remove the leading and trailing asterisks (*) from the serial number to get it working.