Description:
GogTasks is a tool for synchronizing tasks between Microsoft Pocket Outlook and Google Task. It also provides a user interface for administrating the tasks which better suit the Google Tasks functionality. The UI is designed to allow finger control instead of the use of a stylus.
Warning:
GogTasks make use of an unsupported service from Google. There is no guarantee that Google doesn't make breaking changes tomorrow that renders this software useless.
Features:
- Synchronize tasks with Google Tasks.
- Add, edit and delete tasks.
- Multiple lists.
- Subtasks (indentation) and task ordering.
- Task deadlines and detailed notes.
Screenshots:

Should work on all Windows Mobile 6.x-based devices. Copy the .CAB file to your device and launch it from there.
Update Description:
v2.4.1 (02-09-2010):
- Fixed missing files in CAB causing exception at launch (introduced in v2.4).
- Attempt to fix ParseError.
v2.4:
- Font size setting introduced.
- Fixed icon that i broke in v2.3.1.
v2.3.1:
- Fixed bug that caused "GTL Cookie not set"-error.
v2.3:
- Better error messages and error reporting.
v2.2:
- Support for background syncing through the "Autosync every x minutes" setting.
- Attempt to fix "GTL-Cookie not set"-bug.
v2.1:
- Fixed bug causing duplicated tasks when synchronizing more than 15 new tasks to Google.
v2.0:
- Support for Google Apps accounts.
- Paging support in the main task list enables loading of lists with a large numer of tasks.